Ruby program to calculate the power of a given number using recursion

def CalculatePower(num, power)
    result = 1;
    if power > 0 
        result = num * (CalculatePower(num, power-1));
    end
    return result;
end

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

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

result = CalculatePower(number, power);
print "result: ",result;

Output:

Enter number: 2
Enter power: 3
result: 8