Python While Loops

A while loop in Python repeatedly executes a target statement as long as a given condition is true. It is useful when you want to repeat a block of code until a certain condition is met.

Syntax

The syntax of a while loop in Python is as follows:

while condition:
    # Execute these statements

The loop will continue to execute as long as the condition evaluates to true. Once thecondition becomes false, the loop will exit.

Example

Here's an example of a while loop that prints numbers from 0 to 4:

num = 0
while num < 5:
    print(num)
    num += 1

In this example, the loop starts with num equal to 0. It will print the value ofnum and then increment num by 1 in each iteration. The loop will continue until num is no longer less than 5.

Infinite Loops

Be careful when using while loops, as it's possible to create an infinite loop if the condition never becomes false. For example:

while True:
    # This is an infinite loop

In this example, the condition True is always true, so the loop will never exit unless a break statement is used.

Conclusion

While loops are a powerful tool in Python for repeating actions based on a condition. By understanding how to use while loops, you can create more dynamic and interactive programs.