FLOOR(3M) — MATHEMATICAL FUNCTIONS

NAME

floor, ceil, fabs, rint − absolute value, floor, ceiling and round-to-nearest functions

#include <math.h>

double floor(x)
double x;

double ceil(x)
double x;

double fabs(x)
double x;

double rint(x)
double x;

Fabs returns the absolute value | x |.

Floor returns the value of the greatest integer less than or equal to x.

Ceil returns the value of the least integer greater than or equal to x.

Rint returns the value of the integer nearest x in the direction of the prevailing rounding mode.