Find the product of two numbers in C using recursion

In this tutorial, we will discuss a concept of Find the product of two numbers in C using recursion

In this article, we are going to learn how to Find product of two numbers using recursion in the C programming language

Program

This program allows the entry of two digits from the user and to find the product of two numbers using the recursive function in C programming language.

#include <stdio.h>
#include <stdlib.h>

int product(int,int);   //function prototype / declaration
int main()
{
    int num1,num2,result;  //variable declarataion
    printf("Enter two number to find their product\n");
    scanf("%d %d",&num1,&num2);  //numbers receive from the user
    result=product(num1,num2);//assign the output to variable result
    //function call
    printf("PRoduct of %d and %d is %d\n",num1,num2,result);
    getch();
    return 0;
}

int product(int a, int b)  //function definition
{
    if(a<b)
    {
        return product(b,a);
    }
    else if(b!=0){
            return (a+product(a,b-1));

    }
    else{
        return 0;
    }
}

When the above code is executed, it produces the following results

Enter two numbers to find their product
40
25
Product of 40 and 25 is:1000

Method

Declare three variables num1, num2 and result as “int” type.
Receive two numbers from user and store variable as num1 and num2 respectively.
Call the function and assign the output value to variable result.
Product() function is used to Calculate the product of of two numbers.
Display the result on the screen.

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Find the product of two numbers in C using recursion

Find the product of two numbers in C using recursion