Use of function in mathematics

 // use of function

#include<stdio.h>

#include<math.h>

int main()

{

    printf("%g sqrt of= 9\n",sqrt(9));

    printf("%g =log of 9\n",log(9));

    printf("%g =8.8 after ceil \n",ceil(8.8));

    printf("8 to the power 2= %g\n",pow(8,2));

}