August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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Math.sqrt()
JavaScript 1.0+, ECMAScript 1.0+, JScript 1.0+ Nav2+, NES2+, IE3+, Opera3+ Syntax
math.sqrt(num)
Description
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.
Example
Listing 6.173 shows how the sqrt() method is used.
Listing 6.173 Example of the sqrt() Method
<html> <body> <script language="JavaScript"> <!–– Hide // function calculates the square root of input number function doMath(){ var inputNum1=document.form1.input1.value; var result = Math.sqrt(inputNum1); document.form1.answer.value = result; } // End Hide ––> </script> <form name=form1> Enter Number: <input type="text" name="input1" size=10> <input type="button" ... |
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