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Ruby program to find the reverse of a given number using recursion

Ruby Example: Write a program to find the reverse of a given number using recursion.
Submitted by Nidhi, on December 25, 2021

Problem Solution:

In this program, we will read an integer number from the user and find the reverse of the input number using recursion.

Program/Source Code:

The source code to find the reverse of a given number using recursion is given below. The given program is compiled and executed successfully.

# Ruby program to find the reverse of 
# given number using recursion

def reverse(num,rev)
	if num > 0 
	    rem = (num % 10);
		rev = rev*10+rem;
		reverse(num / 10,rev);
	else
	    return rev;    
	end
end

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

result = reverse(number, 0);
print "Result is: ",result;

Output:

Enter number: 1234
Result is: 4321

Explanation:

In the above program, we read an integer number from the user. Then we found the reverse of the input number using recursive function reverse(). Then we printed the result.

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