Section 24.106. Math.ceil( ): round a number up


24.106. Math.ceil( ): round a number up

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24.106.1. Synopsis

Math.ceil(x)

24.106.1.1. Arguments

x

Any numeric value or expression.

24.106.1.2. Returns

The closest integer greater than or equal to x.

24.106.2. Description

Math.ceil( ) computes the ceiling functioni.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.

24.106.3. 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 




JavaScript. The Definitive Guide
JavaScript: The Definitive Guide
ISBN: 0596101996
EAN: 2147483647
Year: 2004
Pages: 767

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