Example: Sum of Two Numbers in C using Recursion

C
C++
C#
Java
Python
PHP

// Sum of Two Numbers in C using Recursion
#include <stdio.h>
int sum;

// This function will return sum of two integer numbers
int Sum(int a, int b) {
    if (b == 0)
        return a;

    // Recursion: adding 1, N times and, then at the end adding m to it
    sum = Sum(a, b - 1) + 1;
    return sum;
}

// It's the driver function
int main() {
    int p, q;
    
    printf("Enter two integer values::\n");
    scanf("%d %d", &p, &q);
    
    printf("Result:: %d + %d = %d\n", p, q, Sum(p, q));
    return 0;
}