floor(3M)                                               floor(3M)



NAME
     floor, ceil, fmod, fabs, remainder - floor, ceiling, abso-
     lute value, remainder functions

SYNOPSIS
     #include <math.h>

     double floor (x)
     double x;

     double ceil (x)
     double x;

     double fmod (x, y)
     double x, y;

     double fabs (x)
     double x;

     double remainder (x, y)
     double x, y;

DESCRIPTION
     floor returns the largest integer (as a double-precision
     number) not greater than x.

     Ceil returns the smallest integer not less than x.

     Fmod returns the floating-point remainder of the division of
     x by y:  x if y is zero or if x/y would overflow; otherwise
     the number f with the same sign as x, such that x = iy + f
     for some integer i, and |f| < |y|.

     Fabs returns the absolute value of x, |x|.

     Remainder returns the floating point remainder of the divi-
     sion of x by y.  More precisely, it returns the value r = x
     - yn, where n is the integer nearest the exact value x/y.
     Whenever |n - x/y| = 1/2, then n is even.

DIAGNOSTICS
     Fmod returns x when y is zero or if x/y would overflow and
     sets errno to EDOM.

     Remainder returns QNaN when y is 0 and sets errno to EDOM.
     This error-handling procedures may be changed with the func-
     tion matherr(3M).

SEE ALSO
     abs(3C).





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