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 FreeBSD 5.3.