JavaScript break statement

Examples

The examples we use the break statement in a loop.

Loop code block, exiting the loop variable i is "3":

var text = ""
var i;
for (i = 0; i <5; i ++) {
if (i == 3) {
break;
}
text + = "The number is" + i + " ";
}

text output is:

The number is 0
The number is 1
The number is 2

try it"

At the bottom of this article contains more examples.

Definition and Usage

break statement is used to exit the switch statement or loop statements (for, for ... in, while, do ... while).

When a break statement is used to switch statement, will switch out of a block of code, code execution is halted.

When the break statement is used to loop when the loop terminates and execution cycle after the code (if any).

The same statement can be used to break an optional label references for out of the code block. (See the following "more examples").

Note: break statement (with no label references), it can only be used in loops or switch.

Browser Support

Statements
break	Yes	Yes	Yes	Yes	Yes

grammar

break;

Using the optional label references:

breaklabelname;

technical details

JavaScript version:	1.0. JavaScript 1.2 supports optional label.

More examples

Examples

This example uses the break statement in a while loop statement.

Loop code block, in exiting the loop i is equal to "3":

var text = "";
var i = 0;
while (i <5) {
text + = " The number is" + i;
i ++;
if (i == 3) {
break;
}
}

text output is:

The number is 0
The number is 1
The number is 2

try it"

Examples

Out of the switch statement block, ensure that only one case block execution:

var day;
switch (new Date (). getDay ()) {
case 0:
day = "Sunday";
break;
case 1:
day = "Monday";
break;
case 2:
day = "Tuesday";
break;
case 3:
day = "Wednesday";
break;
case 4:
day = "Thursday";
break;
case 5:
day = "Friday";
break;
case 6:
day = "Saturday";
break;
}

day output is:

try it"

Examples

Use the break statement in reference label for jump code block:

var cars = [ "BMW", "Volvo", "Saab", "Ford"];
var text = "";

list: {
text + = cars [0] + " ";
text + = cars [1] + " ";
text + = cars [2] + " ";
break list;
text + = cars [3] + " ";
}

text output is:

BMW
Volvo
Saab

try it"