FLOOR(3M) Mathematical Library Functions FLOOR(3M)

floor, floorf, floorl - floor function

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double floor(double x);

float floorf(float x);

long double floorl(long double x);

These functions compute the largest integral value not greater than x.

Upon successful completion, these functions return the largest integral value not greater than x, expressed as a double, float, or long double, as appropriate for the return type of the function.

If x is NaN, a NaN is returned.

If x is ±Inf or ±0, x is returned.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard
MT-Level MT-Safe

math.h(3HEAD), ceil(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), attributes(7), standards(7)

July 12, 2006 SunOS 5.11