I am wondering why this code seems to loop infinitely? The logic, while not False = while True, and this True is referring to 100 < 0 which is false, hence it should execute the print statement instead, right? Why is it stuck in the loop then..?

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

a while statement should be proceeded with a conditional. The conditional True (or in your cause not False) always evaluates to True so the loop never ends.

the if block is never executed because because num < 0 never evaluates to True. Did you mean to decrement num by 1 in each iteration of the while block? If so, add a num = num - 1 within the while block:

num = 100
while not False:if num < 0:breaknum = num - 1
print('num is: ' + str(num))