DragonFly On-Line Manual Pages


TRUNC(3)	      DragonFly Library Functions Manual	      TRUNC(3)

NAME

trunc, truncf, truncl -- nearest integral value with magnitude less than or equal to |x|

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h> double trunc(double x); float truncf(float x); long double truncl(long double x);

DESCRIPTION

The trunc(), truncf(), and truncl() functions return the nearest integral value with magnitude less than or equal to |x|. They are equivalent to rint(), rintf(), and rintl(), respectively, in the FE_TOWARDZERO rounding mode.

SEE ALSO

ceil(3), fesetround(3), floor(3), math(3), nextafter(3), rint(3), round(3)

STANDARDS

The trunc(), truncf(), and truncl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY

These routines first appeared in DragonFly 1.9. The long double version appeared in DragonFly 2.13. DragonFly 3.9 December 21, 2011 DragonFly 3.9