--- title: break slug: Web/JavaScript/Reference/Statements/break translation_of: Web/JavaScript/Reference/Statements/break ---
Break ifadesi içinde bulunduğu döngüyü , {{jsxref("Statements/switch", "switch")}}, or {{jsxref("Statements/label", "label")}} ifadelerini sonlandırır ve programın kontrolünü sonlandırılan ifadeyi ardından takip eden ifadeye geçirir.
break [etiket];
etiketThe break statement includes an optional label that allows the program to break out of a labeled statement. The break statement needs to be nested within the referenced label. The labeled statement can be any {{jsxref("Statements/block", "block")}} statement; it does not have to be preceded by a loop statement.
The following function has a break statement that terminates the {{jsxref("Statements/while", "while")}} loop when i is 3, and then returns the value 3 * x.
function testBreak(x) {
var i = 0;
while (i < 6) {
if (i == 3) {
break;
}
i += 1;
}
return i * x;
}
The following code uses break statements with labeled blocks. A break statement must be nested within any label it references. Notice that inner_block is nested within outer_block.
outer_block: {
inner_block: {
console.log('1');
break outer_block; // breaks out of both inner_block and outer_block
console.log(':-('); // skipped
}
console.log('2'); // skipped
}
The following code also uses break statements with labeled blocks but generates a Syntax Error because its break statement is within block_1 but references block_2. A break statement must always be nested within any label it references.
block_1: {
console.log('1');
break block_2; // SyntaxError: label not found
}
block_2: {
console.log('2');
}
| Specification | Status | Comment |
|---|---|---|
| {{SpecName('ES1')}} | {{Spec2('ES1')}} | Initial definition. Unlabeled version. |
| {{SpecName('ES3')}} | {{Spec2('ES3')}} | Labeled version added. |
| {{SpecName('ES5.1', '#sec-12.8', 'Break statement')}} | {{Spec2('ES5.1')}} | |
| {{SpecName('ES6', '#sec-break-statement', 'Break statement')}} | {{Spec2('ES6')}} | |
| {{SpecName('ESDraft', '#sec-break-statement', 'Break statement')}} | {{Spec2('ESDraft')}} |
{{Compat("javascript.statements.break")}}