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Ruby program to calculate the product of two given numbers using recursion

Ruby Example: Write a program to calculate the product of two given numbers using recursion.
Submitted by Nidhi, on December 27, 2021

Problem Solution:

In this program, we will read two integer numbers from the user and calculate the product of input numbers using recursion.

Program/Source Code:

The source code to calculate the product of two given numbers using recursion is given below. The given program is compiled and executed successfully.

# Ruby program to calculate the product 
# of two given numbers using recursion

def calculateProduct(a, b)
    if a < b
        return calculateProduct(b, a);
    elsif b != 0
        return (a + calculateProduct(a, b - 1));
    else
        return 0;
    end
end

print "Enter number1: ";
number1 = gets.chomp.to_i;  

print "Enter number2: ";
number2 = gets.chomp.to_i;  

result = calculateProduct(number1, number2);

print "Product is: ",result;

Output:

Enter number1: 5
Enter number2: 3
Product is: 15

Explanation:

In the above program, we read two integer numbers from the user. Then we calculated the product of input numbers using recursive function calculateProduct(). Then we printed the result.