Lecture 42:- Break In Python

In Python, the break statement is used to exit (terminate) a loop prematurely. When the break statement is encountered inside a loop (e.g., for or while loop), the loop execution immediately stops, and the program continues with the first statement after the loop.

The break statement is often used in combination with conditional statements (if, else, elif) to exit the loop based on specific conditions.

Here's an example of how the break statement works in a for loop:

pythonCopy code

for num in range(1, 11):    if num == 5:        break    print(num)

Output:

Copy code

1 2 3 4

In this example, the for loop iterates over the numbers from 1 to 10 using the range() function. When the value of num becomes 5, the if statement checks the condition num == 5, which evaluates to True. As a result, the break statement is executed, causing the loop to terminate prematurely. Therefore, only the numbers 1 to 4 are printed, and the loop stops once num becomes 5.

The break statement can also be used with a while loop to exit the loop based on certain conditions.

Example using break with a while loop:

pythonCopy code

count = 0 while True:    print("Current count:", count)    count += 1    if count >= 5:        break

Output:

sqlCopy code

Current count: 0 Current count: 1 Current count: 2 Current count: 3 Current count: 4

In this example, the while loop runs indefinitely (while True) and prints the value of count in each iteration. However, when the value of count becomes 5 or greater, the if statement with break is executed, causing the loop to break and terminate.

The break statement is useful when you want to exit a loop early based on certain conditions. It helps to prevent unnecessary iterations and can be a valuable tool for controlling the flow of your program.