Ruby program to count the digits of a given number using recursion

Program/Source Code:

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

# Ruby program to count the digits 
# of given number using recursion

def CountDigits(num,count)
	if num > 0 
		CountDigits(num / 10,count+1);
	else
	    return count;    
	end
end

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

result = CountDigits(number, 0);
print "Total digits are: ",result;

Output:

Enter number: 4326
Total digits are: 4

Explanation:

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