Ruby program to calculate the factorial of given number using recursion

def factorial(num)
    if num == 1 
        return 1;
    else 
        return num * factorial(num-1);
    end
end

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

fact = factorial(num);

print "Factorial is: ",fact;

Output:

Enter number: 5
Factorial is: 120