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).