Python break and continue

Tóm Tắt

What is the use of break and continue in Python?

In Python, break and continue statements can alter the flow of a normal loop.

Loops iterate over a block of code until the test expression is false, but sometimes we wish to terminate the current iteration or even the whole loop without checking test expression.

The break and continue statements are used in these cases.

Python break statement

The break statement terminates the loop containing it. Control of the program flows to the statement immediately after the body of the loop.

If the break statement is inside a nested loop (loop inside another loop), the break statement will terminate the innermost loop.

Syntax of break

break

Flowchart of break

Flowchart of break statement in Python

The working of break statement in for loop and while loop is shown below.

How the break statement works in Python Working of the break statement

Example: Python break

# Use of break statement inside the loop

for val in "string":
    if val == "i":
        break
    print(val)

print("The end")

Output

s
t
r
The end

In this program, we iterate through the “string” sequence. We check if the letter is i, upon which we break from the loop. Hence, we see in our output that all the letters up till i gets printed. After that, the loop terminates.

Python continue statement

The continue statement is used to skip the rest of the code inside a loop for the current iteration only. Loop does not terminate but continues on with the next iteration.

Syntax of Continue

continue

Flowchart of continue

Flowchart of continue statement in Python

The working of the continue statement in for and while loop is shown below.

How continue statement works in python

Example: Python continue

# Program to show the use of continue statement inside loops

for val in "string":
    if val == "i":
        continue
    print(val)

print("The end")