floor(3M)                                                  floor(3M)


       NAME
             floor, floorf, ceil, ceilf, copysign, fmod, fmodf, fabs,
             fabsf, rint, remainder - floor, ceiling, remainder, absolute
             value functions

       SYNOPSIS
             cc [flag ...] file ...  -lm [library ...]
             #include <math.h>
             double floor(double x);
             float floorf(float x);
             double ceil(double x);
             float ceilf(float x);
             double copysign(double x, double y);
             double fmod(double x, double y);
             float fmodf(float x, float y);
             double fabs(double x);
             float fabsf(float x);
             double rint(double x);
             double remainder(double x, double y);

       DESCRIPTION
             floor and floorf return the largest integer not greater than
             x.  ceil and ceilf return the smallest integer not less than
             x.

             copysign returns x but with the sign of y.

             fmod and fmodf return the floating point remainder of the
             division of x by y.  More precisely, they return the number f
             with the same sign as x, such that x = iy + f for some integer
             i, and |f| < |y|.

             fabs and fabsf return the absolute value of x, |x|.

             rint returns the nearest integer value to its floating point
             argument x as a double-precision floating point number.  The
             returned value is rounded according to the currently set
             machine rounding mode.  If round-to-nearest (the default mode)
             is set and the difference between the function argument and
             the rounded result is exactly 0.5, then the result will be
             rounded to the nearest even integer.

             remainder returns the floating point remainder of the division
             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.


                           Copyright 1994 Novell, Inc.               Page 1

      floor(3M)                                                  floor(3M)


         Errors
            When x is _ oo or y is zero fmod, fmodf and remainder return
            IEEE NaN on systems that support it and raise the invalid
            operation exception.  Otherwise, they return 0.  errno is set
            to EDOM.

            On systems that support IEEE NaN, if any of the inputs to each
            of these functions is a quiet NaN, that value is returned.  If
            any of the inputs is a signaling NaN, a quiet NaN is returned
            and the invalid operation exception is raised.  In either
            case, errno is set to EDOM.

            If the program was compiled with the -Xt compilation mode,
            fmod and fmodf return x when y is zero and set errno to EDOM.
            In addition, a message indicating DOMAIN error is printed on
            the standard error output.  These error handling procedures
            may be changed with the function matherr.

      REFERENCES
            abs(3C), cc(1), matherr(3M)




























                          Copyright 1994 Novell, Inc.               Page 2