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# Prototype reduce() Method

This method reduces arrays: one-element arrays are turned into their unique element, while multiple-element arrays are returned untouched.

## Syntax:

    array.reduce()  ;

## Return Value :

- If its one-element array then it turned into their unique element
- If its multi-elements array then it remains untouched.

## Example:

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

    function showResult(){

       var arr = [10];
       alert("Reduced Element : "  + arr.reduce());
       var arr = [10, 20, 30, 40];
       alert("Reduced Element : "  + arr.reduce().inspect());
    }

    </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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