August 2006
Intermediate to advanced
1018 pages
34h 13m
English
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Name
Math.floor( ): round a number down — 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
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