Synopsis
#include <math.h>
float ceilf(float x);
Description
ceilf computes the smallest integer value not less than x.
IEC 60559 math library behavior
ceilf(±0) is ±0.
ceilf(±∞) is ±∞.
Portability
ceilf conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).