While not Python | Example code

While not loop works the same as a simple while loop, it will repeatedly execute the loop’s body until the condition for loop termination is matched. Where a boolean expression executes the loop’s body if the condition evaluates to False.

count= 3


while not (count== 0) :

   print(count)

   count= count- 1

As the above code loop will execute until the count is zero.

Output:

While not a Python example with an iterable object

The above example code only used a single variable. Let’s execute the loop’s body if the variable is not present in the iterable object.

a_list = [1, 2, 3]

while 3 not in a_list:
    a_list.append(len(a_list) + 1)

print(a_list)

Output: [1, 2, 3]

Do comment if you have any doubts or suggestions on this Python while loop topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.