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# Prototype truncate() Method

This method truncates a string to the given length and appends a suffix to it (indicating that it is only an excerpt).

If unspecified, the length parameter defaults to 30 and the suffix to "...".

## Syntax:

    string.truncate([length = 30[, suffix = '...']]) ;

## Return Value:

- Returns a truncated string.

## Example:

    <html>
    <head>
    <title>Prototype examples</title>
    <script type="text/javascript"
       src="/javascript/prototype.js">
    </script>
    <script>

    function showResult(){
       var str = 'A random sentence whose length exceeds 30 characters.';

       alert("str.truncate() : " + str.truncate() );
       alert("str.truncate( 10 ) : " + str.truncate(10) );
       alert("str.truncate( 10, '...') : " +
              str.truncate(10, '...') );
    }

    </script>
    </head>

    <body>

      <p>Click the button to see the result.</p>
      <br />
      <br />
      <input type="button" value="Result" onclick="showResult();"/>

    </body>
    </html>

To understand it in better way you can Try it yourself.

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