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TRUNC(3)                   Linux Programmer's Manual                  TRUNC(3)



NAME
       trunc, truncf, truncl - round to integer, towards zero

SYNOPSIS
       #include <&lt;math.h>&gt;

       double trunc(double x);
       float truncf(float x);
       long double truncl(long double x);

       Link with -lm.

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       trunc(), truncf(), truncl(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or
       cc -std=c99

DESCRIPTION
       These functions round x to the nearest integer not larger  in  absolute
       value.

RETURN VALUE
       The rounded integer value.  If x is integral, infinite or NaN, x itself
       is returned.

ERRORS
       None.

CONFORMING TO
       C99.

SEE ALSO
       ceil(3), floor(3), lrint(3), nearbyint(3), rint(3), round(3)

COLOPHON
       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



                                  2007-07-26                          TRUNC(3)