While loop in Python

Create dynamic and interactive programs using while loop

In Python , the while loop is a powerful construct that allows us to repeat a block of code as long as a certain condition remains true. It enables us to create dynamic and interactive programs by continuously executing code until a specific condition is met.

Syntax

The basic syntax of a while loop looks like this:

while condition:
    # Code block executed as long as the condition is true

Let's break down the parts of the syntax:

• condition

  This is a condition that evaluates to either true or false . As long as the condition remains true, the code block will be executed repeatedly. If the condition becomes false, the loop will exit, and the program continues to the next section of code.

• Code block

  This is the set of instructions that will be executed repeatedly as long as the condition remains true. It can contain one or more lines of code.

Example

Let's see a practical example of how the while loop works. Imagine we want to count from 1 to 5 and print each number:

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

When we run this code, it will output:

1
2
3
4
5

As you can see, the while loop keeps executing the code block as long as the condition count <= 5 is true. In each iteration, it prints the value of count and increments it by 1 using the count += 1 statement.

Conclusion

The while loop is a valuable tool in Python for creating dynamic and interactive programs. It allows you to repeat a block of code until a specific condition is met. By mastering the use of while loops, you can build powerful programs that respond to user input or perform iterative tasks. Keep exploring different examples and experimenting with different conditions to enhance your programming skills!