HP-UX Reference (11i v1 05/09) - 3 Library Functions N-Z (vol 7)

t
trunc(3M) trunc(3M)
NAME
trunc() - truncation function
SYNOPSIS
#include <math.h>
double trunc(double x);
DESCRIPTION
trunc() rounds its argument to the integral value, in floating-point format, nearest to but no larger in
magnitude than the argument.
The ISO/ANSI C committee has approved the
trunc() function for inclusion in the C9X draft standard.
To use this function, compile either with the default
-Ae option or with the -Aa and -D_HPUX_SOURCE
options. Make sure your program includes <
math.h>. Link in the math library by specifying -lm on the
compiler or linker command line.
RETURN VALUE
The
trunc() function returns the truncated integral value.
ERRORS
No errors are defined.
SEE ALSO
ceil(3M), floor(3M), fabs(3M), fmod(3M), fegetround(3M), fesetround(3M), lrint(3M), llrint(3M), lround(3M),
llround(3M), rint(3M), round(3M), math(5), fenv(5).
Section 3−−1016 Hewlett-Packard Company − 1 − HP-UX 11i Version 1: September 2005