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# Javascript Math - log Method

## Description:

This method returns the natural logarithm (base E) of a number. If the value of number is negative, the return value is always NaN.

## Syntax:

    Math.log( x ) ;

Here is the detail of parameters:

- x : A numbers.

## Return Value:

Returns the natural logarithm (base E) of a number.

## Example:

    <html>
    <head>
    <title>JavaScript Math log() Method</title>
    </head>
    <body>
    <script type="text/javascript">

    var value = Math.log(10);
    document.write("First Test Value : " + value );

    var value = Math.log(0);
    document.write("<br />Second Test Value : " + value );

    var value = Math.log(-1);
    document.write("<br />Third Test Value : " + value );

    var value = Math.log(100);
    document.write("<br />Fourth Test Value : " + value );
    </script>
    </body>
    </html>

This will produce following result:

    First Test Value : 2.302585092994046
    Second Test Value : -Infinity
    Third Test Value : NaN
    Fourth Test Value : 4.605170185988092

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

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