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Table of Contents
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Index
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Reviews
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Examples
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Errata
JavaScript: The Definitive Guide, 4th Edition
By
David Flanagan
Publisher
: O'Reilly
Pub Date
: November 2001
ISBN
: 0-596-00048-0
Pages
: 936
Slots
: 1
This fourth edition of the definitive reference to
JavaScript, a scripting language that can be embedded
directly in web pages, covers the latest version of the
language, JavaScript 1.5, as supported by Netscape 6 and
Internet Explorer 6. The book also provides complete
coverage of the W3C DOM standard (Level 1 and Level 2),
while retaining material on the legacy Level 0 DOM for
backward compatibility.
Availability
JavaScript 1.0; JScript 1.0; ECMAScript v1
Synopsis
Math.sqrt(x)Arguments
x
A numeric value greater than or equal to zero.
Returns
The square root of x. Returns
NaN if x is less than
zero.
Description
Math.sqrt( ) computes the square root of a number.
Note, however, that you can compute arbitrary roots of a number with
Math.pow( ). For example:
Math.cuberoot = function(x){ return Math.pow(x,1/3); }
Math.cuberoot(8); // Returns 2