TRUNC(3) | Library Functions Manual | TRUNC(3) |
trunc
— truncate
to integer value
#include
<math.h>
double
trunc
(double
x);
long double
truncl
(long
double x);
float
truncf
(float
x);
The
trunc
()
functions return the integral value nearest to but no larger in magnitude
than x.
trunc
(±0)
returns ±0.
trunc
(±infinity)
returns ±infinity.
If you need to apply the trunc
() function
to SIMD vectors or arrays, using the following functions provided by the
Accelerate.framework may give significantly better performance:
#include
<Accelerate/Accelerate.h>
vFloat
vintf
(vFloat
x);
void
vvintf
(float
*y, const float *x, const int
*n);
void
vvint
(double
*y, const double *x, const int
*n);
The trunc
() functions conform to ISO/IEC
9899:2011.
December 11, 2006 | macOS 14.6 |