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#include<stdio.h>
#include<math.h>

int main()
{ 
      printf("%f %f", floor(2.5), ceil(2.5));
      return 0;
}

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>>> import math
>>> a = [3.4, 3.5, 3.6]
>>> methods = [math.floor, math.ceil, math.trunc, round, int]
>>> for m in method:
...     print m, map(m, a)
<built-in function floor> [3.0, 3.0, 3.0]
<built-in function ceil> [4.0, 4.0, 4.0]
<built-in function trunc> [3, 3, 3]
<built-in function round> [3.0, 4.0, 4.0]
<type 'int'> [3, 3, 3]