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C Program to find Product of 2 Numbers using Recursion

This C program using recursion, finds the product of 2 numbers without using the multiplication operator.

Here is the source code of the C program to display a linked list in reverse. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

1. /*

2.  * C Program to find Product of 2 Numbers using Recursion

3.  */

4. #include <stdio.h>

6. int product(int, int);

8. int main()

9. {

10.     int a, b, result;

12.     printf("Enter two numbers to find their product: ");

13.     scanf("%d%d", &a, &b);

14.     result = product(a, b);

15.     printf("Product of %d and %d is %d\n", a, b, result);

16.     return 0;

17. }

19. int product(int a, int b)

20. {

21.     if (a < b)

22.     {

23.         return product(b, a);

24.     }

25.     else if (b != 0)

26.     {

27.         return (a + product(a, b - 1));

28.     }

29.     else

30.     {

31.         return 0;

32.     }

33. }

$ cc pgm20.c
$ a.out
Enter two numbers to find their product: 176 340
Product of 176 and 340 is 59840