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JavaScript: The Definitive Guide, Fourth Edition
book

JavaScript: The Definitive Guide, Fourth Edition

by David Flanagan
November 2001
Intermediate to advanced content levelIntermediate to advanced
936 pages
68h 43m
English
O'Reilly Media, Inc.
Content preview from JavaScript: The Definitive Guide, Fourth Edition

Name

Math.sqrt( ) — compute a square root

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
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Publisher Resources

ISBN: 0596000480Supplemental ContentCatalog PageErrata