Space - Nora

calculator-nr.rb

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+puts "Welcome to Nora's Basic Calculator."
+
+puts "Please choose one of these commands:"
+
+# the commands the calculator will recognize
+maths = ['add', '+', 'subtract', '-', 'multiply', '*', 'divide', '/']
+
+# NOTE I struggled with getting validation to work
+# validate from class
+# def validate_num[num]
+#  is_valid = num.to_i.to_s == input || num.to_f.to_s == num
+#  return is_valid
+#end
+
+# print the list of commands
+maths.length.times do |i|
+  puts "#{maths[i]}"
+end
+
+# user picks type of operation
+puts "What's your choice? "
+command = gets.chomp.downcase
+
+# verify the user's operation is in our command list
+until maths.include?(command)
+  puts "Please tell me to add (+), subtract (-), multiply (*), or divide (/)!"
+  command = gets.chomp.downcase
+end
+
+puts "Enter the first number: "
+user_num1 = gets.chomp.to_i
+
+# NOTE - second part of my validation code I couldn't get to work
+# if validate_num[user_num1] == false
+# puts "Oops. Please enter a number: "
+# user_num1 = gets.chomp
+# else
+  puts "Enter a second number: "
+  user_num2 = gets.chomp.to_i
+# end
+
+
+puts "**********"
+
+# NOTE since my validation wasn't working I made some not very useful methods just to demonstrate making a method
+def calc_subtract(num1, num2)
+  puts "#{num1} - #{num2} = #{num1 - num2}"
+end
+
+def calc_add(num1, num2)
+  puts "#{num1} + #{num2} = #{num1 + num2}"
+end
+
+# choose the type of operation and output based on the command
+case command
+  when "add", "+"
+    calc_add(user_num1, user_num2)
+  when "subtract", "-"
+    calc_subtract(user_num1, user_num2)
+  when "multiply", "*"
+    puts "#{user_num1} * #{user_num2} = #{(user_num1 * user_num2)}"
+  when "divide", "/"
+    if user_num1 != 0 && user_num2 != 0
+    puts "#{user_num1} / #{user_num2} = #{user_num1 / user_num2}"
+    else
+    puts "Sorry, you can't divide by 0."
+    end
+  end 
+
+puts "That's some basic math for you!"