simple_calculator.rb

def addition_function
    puts "Which numbers would you like to add?"
    @n1 = gets.chomp
    @n2 = gets.chomp
    @answer = @n1 + @n2
    # @n1 + @n2 == @answer
    puts "The sum is... #{@answer}"
end

def subtraction_function
    puts "Which numbers would you like to subtract?"
    @n1 = gets.chomp.to_i
    @n2 = gets.chomp.to_i
    @n1 - @n2 == @answer
    puts "The answer is... #{@answer}"
end

def multiplication_function
puts "Which numbers would you like to multiply?"
    @n1 = gets.chomp
    @n2 = gets.chomp
    @n1 * @n2 == @answer
    puts "The answer is... #{@answer}"
end

puts "Would you like to [add], [multiply], or [subtract]?"
response = gets.chomp
if response == "add" then
    addition_function
end
if response == "subtract" then
    subtraction_function
end
if response == "multiply" then
    multiplication_function
end