JavaScript Tutorial/Statement/Break

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Break a while statement

<html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
<!--
var x = 0;
while (x < 10)
{
    x++;
    document.write(x);
    break;
    document.write("Never seen!");
}
//  -->
</script>
</head>
<body>
</body>
</html>


Break statement in a if statement

<html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
<!--
var x = 0, breakat;
breakat = prompt("Pick a number between 1 and 10 to break at", "");
while (x < 10) {
    if (x == breakat)
        break;
    }
    document.write(x);
    x++;
}
//  -->
</script>
</head>
<body>
</body>
</html>


break statement syntax

The keyword break exits out of loop structures and switch statement.

When a label is used, JavaScript completely breaks out of the area designated by label.

To label a statement, place the label name followed by a colon (:).

Labels are useful when working with nested loops.



<html>
    <SCRIPT LANGUAGE="JavaScript">
    <!--
    forLoop1:
    for (var counter1 = 1; counter1 <= 5; counter1++)
    {
      for (var counter2 = 1; counter2 <= 5; counter2++)
      {
        document.write("Counter1=",counter1);
        document.write(" Counter2=",counter2,"<BR>");
        if (counter2 == 3)
          break;
        if (counter1 == 3)
          break forLoop1;
      }
    }
    document.write("All done!");
    //-->
    </SCRIPT>
</html>