By | 29.11.2016

# C Program to find Product of two Numbers

Write a C Program to find Product of two Numbers using Recursion. Here’s simple Program to find Product of two Numbers using Recursion in C Programming Language.

## Recursion : :

• Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.
• The C programming language supports recursion, i.e., a function to call itself. But while using recursion, programmers need to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.
• Recursive functions are very useful to solve many mathematical problems, such as calculating the factorial of a number, generating Fibonacci series, etc.

Below is the source code for C Program to find Product of two Numbers using Recursion which is successfully compiled and run on Windows System to produce desired output as shown below :

### SOURCE CODE : :

```/* C Program to find Product of two Numbers using Recursion */

#include <stdio.h>

int product(int, int);

int main()
{
int a, b, result;

printf("Enter two numbers to find their product: ");
scanf("%d%d", &a, &b);
result = product(a, b);
printf("Product of %d and %d is %d\n", a, b, result);
return 0;
}

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

### Output : :

```****************** OUTPUT **********************

****************** FIRST RUN ******************

Enter two numbers to find their product:
27
43
Product of 27 and 43 is 1161

****************** SECOND RUN ******************

Enter two numbers to find their product:
123
321
Product of 123 and 321 is 39483```

If you found any error or any queries related to the above program or any questions or reviews , you wanna to ask from us ,you may Contact Us through our contact Page or you can also comment below in the comment section.We will try our best to reach upto you in the short interval. 