Math functions.

ADDITION:

#include<stdio.h>

main()
{
    int a = 100;
    int b = 2;
    int c;
   
    c=a+b;
printf("The sum of given value is: %d",c);   

}

MULTIPLICATION:

#include<stdio.h>

main()
{
    int a = 100;
    int b = 2;
    int c;
   
    c=a*b;
printf("The sum of given value is: %d",c);   

}