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This method returns the square root of a number. If the value of number is negative, sqrt returns NaN.
Math.sqrt( x ) ; |
Here is the detail of parameters:
x: A number
Returns the sine of a number.
<html> <head> <title>JavaScript Math sqrt() Method</title> </head> <body> <script type="text/javascript"> var value = Math.sqrt( 0.5 ); document.write("First Test Value : " + value ); var value = Math.sqrt( 81 ); document.write("<br />Second Test Value : " + value ); var value = Math.sqrt( 13 ); document.write("<br />Third Test Value : " + value ); var value = Math.sqrt( -4 ); document.write("<br />Fourth Test Value : " + value ); </script> </body> </html> |
This will produce following result:
First Test Value : 0.7071067811865476 Second Test Value : 9 Third Test Value : 3.605551275463989 Fourth Test Value : NaN |
To understand it in better way you can Try it yourself.
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