Collatz Conjecture program randomly stops being accurate at high digits
So while Wikipedia surfing, I stumbled onto the Collatz Conjecture So I decided to write a simple python program,
while True:
x = int(input("Enter a number: "))
n=0
while True:
if (x % 2) == 0:
x = x/2
n += 1
print(x)
else:
x = 3*x +1
n+=1
print(x)
if x == 1:
break
print("N = %d" %(n))
At first I played around with random numbers, and then I decided to test some of the larger numbers that the Wikipedia article represents. The program worked perfectly up until 75,128,138,247 on Wikipedia's " Examples" Section,previously it matched the number of steps exactly, and then it just randomly says "512" for N (the number of steps. I just don't understand why. Can anyone Help?
python math
asked Nov 23 '18 at 4:29
Misha
133
add a comment |
So while Wikipedia surfing, I stumbled onto the Collatz Conjecture So I decided to write a simple python program,
while True:
x = int(input("Enter a number: "))
n=0
while True:
if (x % 2) == 0:
x = x/2
n += 1
print(x)
else:
x = 3*x +1
n+=1
print(x)
if x == 1:
break
print("N = %d" %(n))
At first I played around with random numbers, and then I decided to test some of the larger numbers that the Wikipedia article represents. The program worked perfectly up until 75,128,138,247 on Wikipedia's " Examples" Section,previously it matched the number of steps exactly, and then it just randomly says "512" for N (the number of steps. I just don't understand why. Can anyone Help?
python math
asked Nov 23 '18 at 4:29
Misha
133
add a comment |
So while Wikipedia surfing, I stumbled onto the Collatz Conjecture So I decided to write a simple python program,
while True:
x = int(input("Enter a number: "))
n=0
while True:
if (x % 2) == 0:
x = x/2
n += 1
print(x)
else:
x = 3*x +1
n+=1
print(x)
if x == 1:
break
print("N = %d" %(n))
At first I played around with random numbers, and then I decided to test some of the larger numbers that the Wikipedia article represents. The program worked perfectly up until 75,128,138,247 on Wikipedia's " Examples" Section,previously it matched the number of steps exactly, and then it just randomly says "512" for N (the number of steps. I just don't understand why. Can anyone Help?
python math
asked Nov 23 '18 at 4:29
Misha
133
So while Wikipedia surfing, I stumbled onto the Collatz Conjecture So I decided to write a simple python program,
while True:
x = int(input("Enter a number: "))
n=0
while True:
if (x % 2) == 0:
x = x/2
n += 1
print(x)
else:
x = 3*x +1
n+=1
print(x)
if x == 1:
break
print("N = %d" %(n))
At first I played around with random numbers, and then I decided to test some of the larger numbers that the Wikipedia article represents. The program worked perfectly up until 75,128,138,247 on Wikipedia's " Examples" Section,previously it matched the number of steps exactly, and then it just randomly says "512" for N (the number of steps. I just don't understand why. Can anyone Help?
python math
python math
asked Nov 23 '18 at 4:29
Misha
133
asked Nov 23 '18 at 4:29
Misha
133
edited Nov 23 '18 at 17:39
asked Nov 23 '18 at 4:29
Misha
133
asked Nov 23 '18 at 4:29
Misha
133
asked Nov 23 '18 at 4:29
Misha
133
133
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Float division might cause issues (note output as floats), so work in integers:
change
x = x/2
to integer division (your print correponds to Python 3, so it is available)
x = x // 2
answered Nov 23 '18 at 4:34
MBo
47.1k22848
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Float division might cause issues (note output as floats), so work in integers:
change
x = x/2
to integer division (your print correponds to Python 3, so it is available)
x = x // 2
answered Nov 23 '18 at 4:34
MBo
47.1k22848
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
add a comment |
Float division might cause issues (note output as floats), so work in integers:
change
x = x/2
to integer division (your print correponds to Python 3, so it is available)
x = x // 2
answered Nov 23 '18 at 4:34
MBo
47.1k22848
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
add a comment |
Float division might cause issues (note output as floats), so work in integers:
change
x = x/2
to integer division (your print correponds to Python 3, so it is available)
x = x // 2
answered Nov 23 '18 at 4:34
MBo
47.1k22848
Float division might cause issues (note output as floats), so work in integers:
change
x = x/2
to integer division (your print correponds to Python 3, so it is available)
x = x // 2
answered Nov 23 '18 at 4:34
MBo
47.1k22848
edited Nov 23 '18 at 4:45
answered Nov 23 '18 at 4:34
MBo
47.1k22848
answered Nov 23 '18 at 4:34
MBo
47.1k22848
answered Nov 23 '18 at 4:34
MBo
47.1k22848
47.1k22848
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
add a comment |
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
Thank you! Worked perfectly.
– Misha
Nov 23 '18 at 17:57
add a comment |
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