gistfile1.rb

def addition_function # declare this outside of the case and loop so we can call it repeatedly
  puts "Which numbers would you like to add?"
  n1 = gets.chomp.to_i
  n2 = gets.chomp.to_i
  answer = n1 + n2
  puts "The sum is: #{answer}"
end

def show_menu
  puts "Calculator"
  puts"-" * 40
  puts "[a] - Addition"
  puts "[m] - Multiplication"
  puts "[s] - Subtraction"
  puts "[d] - Division"
  puts "[r] - Square Root"
  puts "[e] - Exponent"
  puts "[f] - Finance Calculation"
  puts "[t] - Trip Calculation"
  puts "[q] - Quit"
  puts"-" * 40
  print "Enter your selection:"
end

show_menu
menu_choice = gets.chomp.downcase

until menu_choice == 'q'
   case menu_choice
   when'a'
      addition_function
   end
   
   show_menu #this will run now after the cae statement has run, thereby returnning to the menu when the addition is complete
   menu_choice = gets.chomp.downcase # ask for the menu_choice again so our choice can change between loops
end