Manual Pages  — TRUNC

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

LIBRARY SYNOPSIS DESCRIPTION SEE ALSO STANDARDS HISTORY

Math Library (libm, -lm)

#include <math.h>

double
trunc(double x);

float
truncf(float x);

long double
truncl(long double x);

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

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

These routines first appeared in FreeBSD 5.3 .