Javascript Math Reference : Square Root

Javascript Math.sqrt


As its name indicate Math.sqrt(x) returns the square root of x. Take at the following example

<html>
<body>
<script type="text/javascript">
<!--

/*
********************************************************
Example - Usage of Math.sqrt
********************************************************
*/
var x = 49;
var z = Math.sqrt(x); // Outputs 7
var y = Math.sqrt(12.23) ; // Outputs 3.4971416900091423
var p = Math.round(Math.sqrt(12.23)*1000)/1000 ; // Truncating to 3 decimal places

document.write ('Math.sqrt(49) is : ' + z + '<br>');
document.write ('Math.sqrt(12.23) is : ' + y+'<br>' );
document.write ('Math.sqrt(12.23) to two decimal place is : ' + p+'<br>' );
 //-->
</script>
</body>
</html>



Try this example online here .