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JavaScript - break statement

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Created by:

elmer

646

In this article, we would like to show you how to use break statement in JavaScript.

1. In loops

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In this example, we use break statement inside a for loop to terminate the loop when the i iterator value reaches 3.

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for (let i = 0; i < 5; i++) {
    if (i === 3) {
        break;
    }
    console.log(i);
}

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2. In switch statement

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In this example, we use break statement to terminate the switch statement when a case is matched and its code executes.

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const number = 1;
​
switch (number) {
    case 1:
        console.log('case 1');
        break;
    case 2:
        console.log('case 2');
        break;
    default:
        console.log('default case');
        break;
}
​

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3. In labeled blocks

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In this example, we use break statement with outer_block label to break out both inner_block and outer_block.

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outer_block: {
    inner_block: {
        console.log('inner block message 1');
        break outer_block;
        console.log('inner block message 2'); // will be skipped
    }
    console.log('outer block message 1'); // will be skipped
}