In this article, we will discuss how to use while True in Python.
While loop is used to execute a block of code repeatedly until given boolean condition evaluated to False. If we write while True then the loop will run forever.
Example: While Loop with True
Python3
# Python program to demonstrate# while loop with True while True: pass |
If we run the above code then this loop will run infinite number of times. To come out of this loop we will use the break statement explicitly.
Let’s consider the below example, where we want to find the sum of the first N numbers. Let’s see the below code for better understanding.
Example: While Loop with True to find the sum of first N numbers
Python3
# Python program to demonstrate# while loop with True N = 10Sum = 0 # This loop will run foreverwhile True: Sum += N N -= 1 # the below condition will tell # the loop to stop if N == 0: break print(f"Sum of First 10 Numbers is {Sum}") |
Sum of First 10 Numbers is 55
In the above example, we have used the while True statement to run the while loop and we have added an if statement that will stop the execution of the loop when the value of N becomes 0 If we do not write this if statement then the loop will run forever and will start adding the negative values of N to the sum.
