JavaScript square root method: first create an HTML sample file; then add a script tag in the body; finally, within the tag, use the "Math.sqrt()" method in javascript to find the square root of a number. .
The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to find the square root in JavaScript?
Using the square root of the sqrt() method in JavaScript
This method returns the square root of a number. If the value of the number is negative, the square root returns NaN.
Syntax
Math.sqrt( x ) ;
The following are the details of the parameters:
x: a number
Return value:
Returns a number sine value.
Example:
<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 the following results:
First Test Value : 0.7071067811865476 Second Test Value : 9 Third Test Value : 3.605551275463989 Fourth Test Value : NaN
[Recommended learning: javascript advanced tutorial]
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