While Loop

Python while Loop

A while loop repeats a block of code as long as a condition remains True. Be careful to update the condition inside the loop to avoid infinite loops.

Basic while Loop

Prints numbers from 1 to 5.

i = 1
while i <= 5:
    print(i)
    i += 1

while-else

The else block runs once when the condition becomes False. It does not run if the loop is stopped by break.

num = 1
while num <= 3:
    print(num)
    num += 1
else:
    print("Loop finished naturally")

Countdown with while

A classic countdown example showing decrement and a stopping condition.

count = 5
while count > 0:
    print(f"T-minus {count}")
    count -= 1
print("Liftoff!")