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break statement Javascript

The Javascript break statement is used to terminate a loop, switch or label statement from further processing. Apply it when you want to force one of those types of statements to stop processing.

Example of terminating a loop using break

Javascript CODE EXAMPLE
for (i = 0; i < 20; i++) {
    if(i >= 5){
        break;
    }
    document.write("Pass index "+i+" of the loop<br />");
}
 

Using break above we were able to take a loop that has a ceiling of 20 passes, and force it to stop processing after 5 passes.

 

Example of terminating a switch statement using break

If break is not applied to cases of a switch statement, the switch statement will keep processing until its end.

Javascript CODE EXAMPLE
var browser = "Chrome";

switch (browser) {
    case "IE":
        document.write("Internet Explorer makes life hard for webmasters.");
        break;
    case "Chrome":
        document.write("Chrome conforms to popular browser standards.");
         break;
    case "Firefox":
        document.write("Firefox is bulky but developer friendly.");
        break;
    default:
        document.write("No information for browser: "+browser);
}
 

 

Related Material

· switch
· for
· while
· continue
· label

 

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