NAME

ceil, ceilf, floor, floorf — ceiling and floor

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
ceil(double x);

float
ceilf(float x);

double
floor(double x);

float
floorf(float x);

DESCRIPTION

The ceil() and ceilf() functions return the smallest integral value greater than or equal to x. Conversely, the floor() and floorf() functions return the largest integral value less than or equal to x.

SEE ALSO

abs(3), fabs(3), math(3), nextafter(3), rint(3)

STANDARDS

The described functions conform to ISO/IEC 9899:1999 (“ISO C99”).