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This method returns the natural logarithm (base E) of a number. If the value of number is negative, the return value is always NaN.
Math.log( x ) ; |
Here is the detail of parameters:
x : A numbers.
Returns the natural logarithm (base E) of a number.
<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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