Python break Statement

The Python break Statement is an important one used to alter the flow of a program. We would like to share two examples to display the working functionality of the Python Break statement in both For loop and While loop

Loops are used to execute certain block of code for n number of times until the test condition is false. There will be some situations where, we have terminate the loop without executing all the lines. In these situations we can use this one, and the Python break statement terminates loop.

The Python break statement is very useful to exit from For, While and Nested Loops. While executing these code blocks, if the compiler finds this inside them, the compiler will stop executing the code inside it and exit immediately from the iteration.

For example, we have 5 lines of code inside the loop and we want to exit from it when certain condition is True otherwise, it has to execute them. In these situations we can place the Python Break statement inside the If condition.

If the condition is True then compiler will execute this statement. It means, the Python break Statement will exit the controller from the loop completely. Otherwise, it will execute all block of code.

Python break Statement in For and While loop

In this program, We are going to use the Python break in For Loop to exit from the block iteration.

In this Python break statement in for loop example, First, we used the for with range() and we are not going to explain the iteration wise execution here.

Inside the for loop, we placed the If condition to test whether i is equal to 6. If the condition is false then Python break will skip this and print that number as output. In Our case 0, 1, 2, 3, 4, 5 using the print function.

If this condition ( i == 6) is True then this statement will execute and the iteration will stop at that number without printing the following print function:

for i in range(0, 11):
    if i == 6:
        break
    print("The Value of the Variable i is: ", i)

In this program, We are going to use the Python break statement inside the While loop to exit from the iteration.

In this example, We initialized the value of i as: i = 0 at the beginning of the code. Within this, we check for the condition whether i is less than or equal to 10 or not.

Inside the While loop we placed If condition to test whether I is equal to 4. If the condition is false, it will skip this case. Next, it prints that number as output (In Our case 0, 1, 2, 3) using the following print function.

If this condition (i == 4) is True then the Python break one will execute and the iteration will stop at that number without printing the following print function.

We also used Arithmetic Operators + operator to increment the i value (i = i +1). If you forgot this line then you will end up in infinite iterations. Please refer continue, For, and While in Python.

i = 0
while i <= 10:
    print(" The Value of the Variable i =  ", i)
    i = i + 1
    if i == 4:
        break

The Value of the Variable i = 0
The Value of the Variable i = 1
The Value of the Variable i = 2
The Value of the Variable i = 3