NAME

floor, floorf, floorl — round to largest integral value not greater than x

SYNOPSIS

Math Library (libm, -lm)
#include <math.h>

double
floor(double x);

float
floorf(float x);

long double
floorl(long double x);

DESCRIPTION

The floor() function returns the largest integral value less than or equal to x. The floorf() function is a single precision version of floor(). The floorl() function is an extended precision version of floor().

SEE ALSO

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

STANDARDS

The floor() function conforms to ANSI X3.159-1989 (“ANSI C89”).

HISTORY

A floor() function first appeared in Version 5 AT&T UNIX.