NAME
floor, floorf, floorl – largest integral value less than or equal to x
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
floor(double x);
float
floorf(float x);
long double
floorl(long double x);
DESCRIPTION
The floor(), floorf() and floorl() functions return the largest integral value less than or equal to x, expressed as a floating-point number.
SEE ALSO
abs(3), ceil(3), fabs(3), ieee(3), math(3), rint(3), round(3), trunc(3)
STANDARDS
The floor() function conforms to ISO/IEC 9899:1990 (“ISO C90”). The floorf() and floorl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).
HISTORY
A floor() function first appeared in Version 5 AT&T UNIX.