Mac Developer Library Developer
Search

 

This manual page is part of Xcode Tools version 5.0

To obtain these tools:

If you are running a version of Xcode Tools other than 5.0, view the documentation locally:

  • In Xcode

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.




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(+-_) 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 pro-vided provided
     vided 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

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.

Feedback