Find the product of two numbers in C using recursion

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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