Question

During lecture 3, 2 methods were shown for finding whether a number is a perfect cube or not. If I implement using WHILE loop, it works perfectly for integer 1957816251 but shows memory error on using FOR loop. Why and how can I rectify this?

Answer 1

Post your for loop.

Answer 2

x=int(raw_input("Enter an integer "))
for ans in range(0, abs(x)+1):
if ans**3 == abs(x):
break
if ans**3 != abs(x):
print str(x)+' is not perfect cube'
else:
if x < 0:
ans=-ans
print 'The Cube root of '+str(x)+' is '+str(ans)

Answer 3

It is producing a MemoryError because you are iterating 1957816252 times.

Answer 4

it is Probably not because you are iterating that many times but because you are creating a list that is that big. try xrange instead of range:
http://dpaste.com/1217969/
http://docs.python.org/2.7/library/functions.html

Answer 5

Thanks alot bwCA....xrange worked.