Javascript Loop - Adding a var to the while condition?

Basically I want to count and display the amount of months it would take to get to a certain point (savings balance) based on a contribution every month.

Here is what I have so far:

function howLong(initial,interest,goal,added){

    var initialDeposit = parseInt(initial);

    var interestInt = parseInt(interest);

    var targetSaving = parseInt(goal);

    var contribution = parseInt(added);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit+contribution

    }

    alert(monthCount)

}

Here is my html form:

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value),document.getElementById('contribution').value">

</form>

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

3

So what is the issue?
– Ankit Agarwal
Nov 23 '18 at 12:13

2

initialDeposit += contribution or initialDeposit = initialDeposit + contribution
– Groo
Nov 23 '18 at 12:13

add a comment |

Basically I want to count and display the amount of months it would take to get to a certain point (savings balance) based on a contribution every month.

Here is what I have so far:

function howLong(initial,interest,goal,added){

    var initialDeposit = parseInt(initial);

    var interestInt = parseInt(interest);

    var targetSaving = parseInt(goal);

    var contribution = parseInt(added);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit+contribution

    }

    alert(monthCount)

}

Here is my html form:

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value),document.getElementById('contribution').value">

</form>

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

3

So what is the issue?
– Ankit Agarwal
Nov 23 '18 at 12:13

2

initialDeposit += contribution or initialDeposit = initialDeposit + contribution
– Groo
Nov 23 '18 at 12:13

add a comment |

Basically I want to count and display the amount of months it would take to get to a certain point (savings balance) based on a contribution every month.

Here is what I have so far:

function howLong(initial,interest,goal,added){

    var initialDeposit = parseInt(initial);

    var interestInt = parseInt(interest);

    var targetSaving = parseInt(goal);

    var contribution = parseInt(added);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit+contribution

    }

    alert(monthCount)

}

Here is my html form:

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value),document.getElementById('contribution').value">

</form>

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

Basically I want to count and display the amount of months it would take to get to a certain point (savings balance) based on a contribution every month.

Here is what I have so far:

function howLong(initial,interest,goal,added){

    var initialDeposit = parseInt(initial);

    var interestInt = parseInt(interest);

    var targetSaving = parseInt(goal);

    var contribution = parseInt(added);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit+contribution

    }

    alert(monthCount)

}

Here is my html form:

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value),document.getElementById('contribution').value">

</form>

javascript loops while-loop

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

edited Nov 23 '18 at 12:26

asked Nov 23 '18 at 12:11

Kyle

asked Nov 23 '18 at 12:11

Kyle

asked Nov 23 '18 at 12:11

Kyle

3

So what is the issue?
– Ankit Agarwal
Nov 23 '18 at 12:13

2

initialDeposit += contribution or initialDeposit = initialDeposit + contribution
– Groo
Nov 23 '18 at 12:13

add a comment |

3

So what is the issue?
– Ankit Agarwal
Nov 23 '18 at 12:13

2

initialDeposit += contribution or initialDeposit = initialDeposit + contribution
– Groo
Nov 23 '18 at 12:13

So what is the issue?
– Ankit Agarwal
Nov 23 '18 at 12:13

initialDeposit += contribution or initialDeposit = initialDeposit + contribution
– Groo
Nov 23 '18 at 12:13

add a comment |

4 Answers
4

active

oldest

votes

You need to add the value of contribution to initialDeposit.

initialDeposit += contribution;

For the other problem, you have an error in the call of the function

document.getElementById('goal').value),document.getElementById('contribution').value"

                                     ^ >>>>>>>>>>>>>>>> should go >>>>>>>>>>>>>>>>> ^

shold be

onclick="howLong(

    document.getElementById('initial').value,

    document.getElementById('interest').value,

    document.getElementById('goal').value,

    document.getElementById('contribution').value

)"

The last round bracket is closing to early.

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

add a comment |

Change to initialDeposit += contribution;

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

add a comment |

As other answers have pointed out initialDeposit += contribution will solve the issue, but you don't need a loop here at all:

var monthCount = Math.ceil((targetSaving - initialDeposit)/contribution);

This is presuming that the contribution is constant, of course.

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

add a comment |

You were missing += operator and interest as well.

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

add a comment |

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4 Answers
4

active

oldest

votes

4 Answers
4

active

oldest

votes

You need to add the value of contribution to initialDeposit.

initialDeposit += contribution;

For the other problem, you have an error in the call of the function

document.getElementById('goal').value),document.getElementById('contribution').value"

                                     ^ >>>>>>>>>>>>>>>> should go >>>>>>>>>>>>>>>>> ^

shold be

onclick="howLong(

    document.getElementById('initial').value,

    document.getElementById('interest').value,

    document.getElementById('goal').value,

    document.getElementById('contribution').value

)"

The last round bracket is closing to early.

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

add a comment |

You need to add the value of contribution to initialDeposit.

initialDeposit += contribution;

For the other problem, you have an error in the call of the function

document.getElementById('goal').value),document.getElementById('contribution').value"

                                     ^ >>>>>>>>>>>>>>>> should go >>>>>>>>>>>>>>>>> ^

shold be

onclick="howLong(

    document.getElementById('initial').value,

    document.getElementById('interest').value,

    document.getElementById('goal').value,

    document.getElementById('contribution').value

)"

The last round bracket is closing to early.

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

add a comment |

You need to add the value of contribution to initialDeposit.

initialDeposit += contribution;

For the other problem, you have an error in the call of the function

document.getElementById('goal').value),document.getElementById('contribution').value"

                                     ^ >>>>>>>>>>>>>>>> should go >>>>>>>>>>>>>>>>> ^

shold be

onclick="howLong(

    document.getElementById('initial').value,

    document.getElementById('interest').value,

    document.getElementById('goal').value,

    document.getElementById('contribution').value

)"

The last round bracket is closing to early.

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

You need to add the value of contribution to initialDeposit.

initialDeposit += contribution;

For the other problem, you have an error in the call of the function

document.getElementById('goal').value),document.getElementById('contribution').value"

                                     ^ >>>>>>>>>>>>>>>> should go >>>>>>>>>>>>>>>>> ^

shold be

onclick="howLong(

    document.getElementById('initial').value,

    document.getElementById('interest').value,

    document.getElementById('goal').value,

    document.getElementById('contribution').value

)"

The last round bracket is closing to early.

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

function howLong(initial, interest, goal, added) {

  var initialDeposit = parseInt(initial);

  var interestInt = parseInt(interest);

  var targetSaving = parseInt(goal);

  var contribution = parseInt(added);

  var monthCount = 0;

  while (initialDeposit <= targetSaving) {

    monthCount++;

    initialDeposit += contribution;

  }

  alert(monthCount)

}

<form>

  Initial Deposit:<br />

  <input type="number" id="initial"><br /><br /> Interest:

  <br />

  <input type="number" id="interest"><br /><br /> Target savings amount:<br />

  <input type="number" id="goal"><br /><br /> Monthly Contribution:<br />

  <input type="number" id="contribution"><br /><br />

  <input type="button" value="How Long!?" onclick="howLong(document.getElementById('initial').value,document.getElementById('interest').value,document.getElementById('goal').value,document.getElementById('contribution').value)">

</form>

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

edited Nov 23 '18 at 12:33

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

answered Nov 23 '18 at 12:14

Nina Scholz

177k1491156

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

add a comment |

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

It must be a problem in my form, this just gives me monthCount = 1 and shows it in an alert (using values initialDeposit = 1000, targetSaving = 1500, contribution = 50).
– Kyle
Nov 23 '18 at 12:22

@Kyle: it says 11 here: jsfiddle.net/jgf0xh7o. If you get rid of the loop (like this, you will get 10, which is actually the correct answer (you should have < in your condition, not <=).
– Groo
Nov 23 '18 at 12:24

@Groo Oh i see, so it's definitely my form then I guess?
– Kyle
Nov 23 '18 at 12:32

right. it is the function, which have the closing bracket to early and omit the added parameter.
– Nina Scholz
Nov 23 '18 at 12:33

@Kyle: just note that <= is wrong, and you don't need a loop at all.
– Groo
Nov 23 '18 at 19:35

add a comment |

Change to initialDeposit += contribution;

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

add a comment |

Change to initialDeposit += contribution;

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

add a comment |

Change to initialDeposit += contribution;

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

Change to initialDeposit += contribution;

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

answered Nov 23 '18 at 12:14

Rafael de Freitas

145

add a comment |

As other answers have pointed out initialDeposit += contribution will solve the issue, but you don't need a loop here at all:

var monthCount = Math.ceil((targetSaving - initialDeposit)/contribution);

This is presuming that the contribution is constant, of course.

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

add a comment |

As other answers have pointed out initialDeposit += contribution will solve the issue, but you don't need a loop here at all:

var monthCount = Math.ceil((targetSaving - initialDeposit)/contribution);

This is presuming that the contribution is constant, of course.

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

add a comment |

As other answers have pointed out initialDeposit += contribution will solve the issue, but you don't need a loop here at all:

var monthCount = Math.ceil((targetSaving - initialDeposit)/contribution);

This is presuming that the contribution is constant, of course.

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

As other answers have pointed out initialDeposit += contribution will solve the issue, but you don't need a loop here at all:

var monthCount = Math.ceil((targetSaving - initialDeposit)/contribution);

This is presuming that the contribution is constant, of course.

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

answered Nov 23 '18 at 12:18

Groo

35.3k1484158

add a comment |

You were missing += operator and interest as well.

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

add a comment |

You were missing += operator and interest as well.

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

add a comment |

You were missing += operator and interest as well.

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

You were missing += operator and interest as well.

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

function howLong(){

    var initialDeposit = parseInt(document.getElementById('initial').value);

    var interestInt = parseInt(document.getElementById('interest').value);

    var targetSaving = parseInt(document.getElementById('goal').value);

    var contribution = parseInt(document.getElementById('contribution').value);

    var monthCount = 0;

    while(initialDeposit <= targetSaving){

        monthCount++;

        initialDeposit += contribution + interestInt; //+= was missing and interestInt as well

    }

    alert(monthCount);

}

<form>

Initial Deposit:<br />

<input type="number" id="initial"><br /><br />

Interest:<br />

<input type="number" id="interest"><br /><br />

Target savings amount:<br />

<input type="number" id="goal"><br /><br />

Monthly Contribution:<br />

<input type="number" id="contribution"><br /><br />

<input type="button" value="How Long!?" onclick="howLong()">

</form>

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

edited Nov 23 '18 at 13:00

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

answered Nov 23 '18 at 12:17

Prasad Telkikar

1,862419

add a comment |

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