fabs, fmod, floor, ceil - absolute value, remainder, floor, ceiling functions #include <u.h>

#include <libc.h>

double floor(double x)

double ceil(double x)

double fabs(double x)

double fmod(double x, double y)

Fabs returns the absolute value | \|x\| |.

Floor returns the largest integer not greater than x .

Ceil returns the smallest integer not less than x .

Fmod returns x if y is zero, otherwise the number f with the same sign as x , such that "x = iy + f\|" for some integer i , and | \|f\| | < | \|y\| |.

/sys/src/libc/port abs (2), frexp (2)