floor(3M)             MATHEMATICAL LIBRARY              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 in-
     teger 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  argu-
     ment  and the rounded result is exactly 0.5, then the result



                   Last change: Math Libraries                  1

floor(3M)             MATHEMATICAL LIBRARY              floor(3M)



     will be rounded to the nearest even integer.

     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.

SEE ALSO
     abs(3C), matherr(3M).

DIAGNOSTICS
     fmod and fmodf return x when y is 0 and set errno  to  EDOM.
     remainder  returns  NaN  when y is 0 and sets errno to EDOM.
     In both cases, except in compilation modes  -Xa  or  -Xc,  a
     message  indicating  DOMAIN error is printed on standard er-
     ror. Except under -Xc, these error-handling  procedures  may
     be changed with the function matherr.






































                   Last change: Math Libraries                  2