Ruby program to create a user-defined function with arguments but without a return value

def AddNum(num1, num2)
   add = num1 + num2;
   print "Addition is: ",add;
end

print "Enter number1: ";
num1 = gets.chomp.to_i;  

print "Enter number2: ";
num2 = gets.chomp.to_i;  

AddNum(num1, num2);

Output:

Enter number1: 10
Enter number2: 20
Addition is: 30