C Program to Add Two Numbers Using Recursion

Recursion is a programming technique that allows the programmer to express operations in terms of themselves. In C, this takes the form of a function that calls itself.

//C program to add two numbers using recursion

#include <stdio.h>
#include <stdlib.h>
int add(int,int);        
int main()
{
    int a,b,r;
    printf("enter two numbers: ");
    scanf("%d %d",&a,&b);		//taking input
     result=add(a,b);			//calling the recursive function
    printf("Sum of two numbers are: %d\n",result);	//output
    getch();
    return 0;
}
int add(int a,int b)    	//recursive function
{
    if(y==0)
        return a;
    else
        return(1+add(a,b-1));
}

Output