Calculator App Example

gistfile1.rb

begin

  puts "Add, Subtract, Divide, or Multiply?"
  
  command = gets.chomp
  
  if command == "add"
          puts "Type in the first number, press enter, then type the other num."
          add1 = gets.chomp
          add2 = gets.chomp
          puts add1.to_f + add2.to_f
  end
  
  if command == "subtract"
          puts "Type in the first number, press enter, then type the other num."
          sub1 = gets.chomp
          sub2 = gets.chomp
          puts sub1.to_f - sub2.to_f
  end
  
  if command == "divide"
          puts "Type in the first number, press enter, then type the other num."
          div1 = gets.chomp
          div2 = gets.chomp
          puts div1.to_f / div2.to_f
  end
  
  if command == "multiply"
          puts "Type in the first number, press enter, then type the other num."
          mult1 = gets.chomp
          mult2 = gets.chomp
          puts mult1.to_f * mult2.to_f
  end
  
  puts "Would you like to calculate again?"
  command1 = gets.chomp
  
end while command1 == "yes"

Took inspiration from your logics for calculating & coded this kalkulator frekwencji librus. Would love to hear your review about it.