osx man page for ceil

CEIL(3) 						   BSD Library Functions Manual 						   CEIL(3)

NAME
     ceil -- round to smallest integral value not less than x

SYNOPSIS
     #include <math.h>

     double
     ceil(double x);

     long double
     ceill(long double x);

     float
     ceilf(float x);

DESCRIPTION
     The ceil() functions return the smallest integral value greater than or equal to x.

SPECIAL VALUES
     ceil(+-0) returns +-0.

     ceil(+-infinity) returns +-infinity.

VECTOR OPERATIONS
     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);

SEE ALSO
     floor(3), round(3), trunc(3), math(3)

STANDARDS
     The ceil() functions conform to ISO/IEC 9899:2011.

BSD
								 December 11, 2006							       BSD