CEIL(3) | Library Functions Manual | CEIL(3) |
ceil
— round to
smallest integral value not less than x
#include
<math.h>
double
ceil
(double
x);
long double
ceill
(long
double x);
float
ceilf
(float
x);
The
ceil
()
functions return the smallest integral value greater than or equal to
x.
ceil
(±0)
returns ±0.
ceil
(±infinity)
returns ±infinity.
If you need to apply the ceil
() 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
vceilf
(vFloat
x);
void
vvceilf
(float
*y, const float *x, const int
*n);
void
vvceil
(double
*y, const double *x, const int
*n);
The ceil
() functions conform to ISO/IEC
9899:2011.
December 11, 2006 | macOS 14.6 |