{{keywords>wiki library source code example reference}}
====== ceil ======

<code c>
     double ceil(double);
</code>
rounding up floating point

===== C Sourcecode Example =====

compile in linux with: gcc ceil.c -o ceil **-lm** -Wall
<code c>     
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

#include <math.h> /* including math library */

int main ()
{
  printf ("ceil from 4.2 is %f\n", ceil (4.2) );
  return 0;
}
</code>
===== output =====

   output:
   user@host:~$ ./ceil 
    ceil from 4.2 is 5.000000