CEIL(3) BSD Library Functions Manual CEIL(3)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() func‐
tions return the largest integral value less than or equal to x.
SEE ALSOabs(3), fabs(3), math(3), nextafter(3), rint(3)STANDARDS
The described functions conform to ISO/IEC 9899:1999 (“ISO C99”).
BSD September 18, 2011 BSD