How do You Break a JavaScript Statement?

The break statement in javascript is used to break or terminate the loops and the statements immediately as soon as the break keyword is encountered.

Syntax

The break keyword is used to terminate or break out of the loop. It can be applied in the for loop, while loop, do while loop, etc... But it can not be applied in statements where there are no loops. So in that case we have to use the label keyword.

Syntax

Description

The break statement as we know is used to break or terminate the loop immediately as soon as it is encountered. Although It can only be applied inside the loops like for loop, while loop, do while loop, etc... But it can not be applied in statements where there are no loops. In that case, we have to use the label with the break keyword, to terminate the statement.

The break statement has many advantages. It helps the programmer to terminate the statement or loop whenever further statements do not need to be executed. Also, the while loop saves us from the situation of an infinite loop.

Working of JavaScript break Statement

Output

In the above example, syntax and working of break are shown. We can see how we can break the loop according to the requirements. Here we have used the break statement as soon as the value of the counter reaches 4, and accordingly, the loop is terminated, showing the above output.

Output

In the above example, syntax and working of break with label are shown. We can see how we can break the statement according to the requirements. Here we have used the break statement as soon as we have printed the name of the first 3 courses, and accordingly, the statement is terminated, showing the above output.

Examples

Break with for loop

The following example shows the break keyword used inside a for loop. As soon as the counter becomes 7, the for loop will terminate showing the following output.

Output

Break with while Loop

The following example shows the break keyword used inside a while loop. The program finds the factorial of 5, and as soon as the x becomes greater than 5, the loop will terminate showing the following output.

Output

Break with Nested Loop

The above example shows the break keyword used in a nested for loop. The break is applied inside the if statement when the value of i is either 1 or 2, the inner loop will terminate showing the following output.

Output

JavaScript Labeled break

The following example shows the break keyword used with a label in a list. The break is applied as soon as we print the first 3 cities, showing the following output.

Output

Break in Labeled blocks that throw Error

The following example shows the break keyword used with the label in the labeled blocks. The break is applied inside block1 with the label as block2, but the compiler does not understand the meaning of block2 because block2 is declared after block1.

Break within Functions

The following example shows the break keyword used within the function. The break is used inside the function which is not allowed in Javascript, so the compiler will throw an error.

Browser Compatibility

The browser compatibility of the break keyword is as follows