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Table of Contents
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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.floor(x)Arguments
x
Any numeric value or expression.
Returns
The closest integer less than or equal to x.
Description
Math.floor( )
computes the floor function -- in
other words, it returns the nearest integer value that is less than
or equal to the function argument.
Math.floor( ) rounds a floating-point value down
to the closest integer. This behavior differs from that of
Math.round( ), which rounds up or down to the
nearest integer. Also note that Math.floor( )
rounds negative numbers down (i.e., to be more negative), not up
(i.e., closer to zero).
Example
a = Math.floor(1.99); // Result is 1.0
b = Math.floor(1.01); // Result is 1.0
c = Math.floor(1.0); // Result is 1.0
d = Math.floor(-1.01); // Result is -2.0
