Space - Chelsea

calculator.rb

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+puts "Welcome to the Calculator!"
+
+puts "What type of math do you need doing? Please choose from this list and put the name or symbol:"
+puts "Add (+)"
+puts "Subtract (-)"
+puts "Multiply (*)"
+puts "Divide (/)"
+
+valid_operator_array = ["add","subtract","multiply","divide","+","-","*","/"]
+operator = gets.chomp.downcase
+
+until valid_operator_array.include?(operator)
+  puts "Please put in a valid input.(Add, Subtract, Multiply, Divide, +,- ,* ,/ )"
+  operator = gets.chomp.downcase
+end
+
+def valid_number(number)
+  alphabet_array = [*'a'..'z', *'A'..'Z']  # https://stackoverflow.com/questions/4846853/generate-array-of-all-letters-and-digits
+  operator_array = ["!","@","#","$","%","^","&","(",")","[","]","{","}","?","_","``","~","|","<",">",",",";",":","=","+","-","*","/"]
+  if number == 0 && number.to_i.to_s == number #for when people truly put in 0
+    return "yes"
+  elsif number.to_i.to_s == number #to catch the integers
+    return "yes"
+  elsif number.to_f.to_s == number #to catch the floats
+    return "yes"
+  elsif number == nil || number == "" #to catch the nils and enters
+    puts "What kind of number is that? Try again!"
+    return "nope"
+  elsif  #to catch the letters and symbols
+    split_num = number.split("")
+    split_num.each do |character|
+      if alphabet_array.include?(character) || operator_array.include?(character)
+        puts "What kind of number is that? Try again!"
+        return "nope"
+      end
+    end
+  end
+end
+
+good_1_number = "nope"
+
+until good_1_number == "yes"
+  puts "Please provide your first number now."
+  num_1 = gets.chomp
+  good_1_number = valid_number(num_1)
+end
+
+good_2_number = "nope"
+
+until good_2_number == "yes"
+  puts "Please provide your second number now."
+  num_2 = gets.chomp
+  good_2_number = valid_number(num_2)
+end
+
+case operator
+when "add","+"
+  puts "You are adding: #{num_1}+#{num_2} = #{num_1.to_f + num_2.to_f}"
+when "subtract","-"
+  puts "You are subtracting: #{num_1}-#{num_2} = #{num_1.to_f - num_2.to_f}"
+when "multiply","*"
+  puts "You are multiplying: #{num_1}*#{num_2} = #{num_1.to_f * num_2.to_f}"
+when "divide","/"
+  if num_1.to_f == 0 || num_2.to_f == 0
+    puts "Excuss me, you are dividing by zero your answer is undefined."
+  else
+    puts "You are dividing: #{num_1}/#{num_2} = #{num_1.to_f / num_2.to_f}"
+  end
+end
+puts "Thank you for using my calculator!"