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Table of Contents
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Index
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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.log(x)Arguments
x
Any numeric value or expression greater than zero.
Returns
The natural logarithm of x.
Description
Math.log( ) computes log3 x the natural logarithm of its argument. The argument must be greater than zero.You can compute the base-10 and base-2 logarithms of a number with
these formulas:
log10x = log10e ·logex log2x = log2e ·logex These formulas translate into the following JavaScript functions:
function log10(x) { return Math.LOG10E * Math.log(x); }
function log2(x) { return Math.LOG2E * Math.log(x); } 