Question

Why is this an infinite loop? (python)

num = 100
while not False:
if num < 0:
break
print('num is: ' + str(num))

Answer 1

Its because you're never decrementing num so num is ALWAYS less than zero and it runs the loop forever.

Answer 2

but it says num= 100, so 100 is always higher than 0

Answer 3

because of exactly that. while not False is actually while True so it will never be lower then 0 (actually in your code it only is 100) so it will never get out of loop.