@c ----------------------------------------------------------------------
@node ceil, math
@subheading Syntax

@example
#include <math.h>

double ceil(double x);
@end example

@subheading Description

This function computes the smallest integer greater than or equal to
@var{x}.

@subheading Return Value

The smallest integer value greater than or equal to @var{x}.

@subheading Portability

@portability ansi, posix