| TRUNC(3) | Library Functions Manual | TRUNC(3) | 
trunc, truncf,
  truncl —
#include <math.h>
double
  
  trunc(double
    x);
float
  
  truncf(float
    x);
long double
  
  truncl(long
    double x);
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
  FP_RZ rounding mode.
trunc(), truncf(), and
  truncl() functions conform to ISO/IEC
  9899:1999 (“ISO C99”).
| November 13, 2013 | NetBSD 9.4 |