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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.ceil(x)Arguments
x
Any numeric value or expression.
Returns
The closest integer greater than or equal to
x.
Description
Math.ceil( ) computes the ceiling
function -- i.e., it returns the closest integer value that is
greater than or equal to the function argument. Math.ceil(
) differs from Math.round( ) in that it
always rounds up, rather than rounding up or down to the closest
integer. Also note that Math.ceil( ) does not
round negative numbers to larger negative numbers; it rounds them up
toward zero.
Example
a = Math.ceil(1.99); // Result is 2.0
b = Math.ceil(1.01); // Result is 2.0
c = Math.ceil(1.0); // Result is 1.0
d = Math.ceil(-1.99); // Result is -1.0
