Mega Code Archive
Math sqrt()
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Syntax
math.sqrt(num)
The sqrt() method of the Math object is used to calculate the square root of a number.
If the return value is outside the required range, sqrt() returns 0.
<html>
<body>
<script language="JavaScript">
<!--
function doMath(){
var inputNum1=document.form1.input1.value;
var result = Math.sqrt(inputNum1);
document.form1.answer.value = result;
}
-->
</script>
<form name=form1>
Enter Number:
<input type="text" name="input1" size=10>
<input type="button" value="Calculate" onClick='doMath()'>
<br>
The square root is:
<input type="text" name="answer" size=20>
</form>
</body>
</html>
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