Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

break Statement

Terminates the current loop, or if in conjunction with a label, terminates the associated statement.

break [label];


Optional. Specifies the label of the statement you are breaking from.

You typically use the break statement in switch statements and while, for, for...in, or do...while loops. You most commonly use the label argument in switch statements, but it can be used in any statement, whether simple or compound.

Executing the break statement causes the program flow to exit the current loop or statement. Program flow resumes with the next statement immediately following the current loop or statement.

In this example, the counter is set up to count from 1 to 99; however, the break statement terminates the loop after 14 counts.

var s = "";
for (var i = 1; i < 100; i++)
    if (i == 15)
    s += i + " ";

In the following code, the break statement refers to the for loop that is preceded by the Inner: statement. When j is equal to 24, the break statement causes the program flow to exit that loop. The numbers 21 through 23 print on each line.

var s = "";

for (var i = 1; i <= 10; i++)
    s += "\n";
    s += "i: " + i;

    s += " j: ";

    for (var j = 21; j <= 30; j++)
        if (j == 24)
             break Inner;
        s += j + " ";

Community Additions

© 2015 Microsoft