diff --git a/calculator.rb b/calculator.rb
new file mode 100644
index 0000000..fef72d0
--- /dev/null
+++ b/calculator.rb
@@ -0,0 +1,82 @@
+# If number is integer, calculate with integer. If number has decimal, calculate with floats
+
+# If division has no remainder, print integer, otherwise print float
+# p calculate_division
+
+# p calculate_exponential
+# first_number = []
+# second_number = []
+
+calculator_options = %w[add + subtract - multiply * divide / exponent **]
+
+# calculator_options = ["add", "+", "subtract", "-", "multiply", "*", "divide", "/", "exponent", "**"]
+def addition(num_one, num_two)
+  return num_one + num_two
+end
+
+def subtraction(num_one, num_two)
+  return num_one - num_two
+end
+
+def multiplication(num_one, num_two)
+  return num_one * num_two
+end
+
+def division(num_one, num_two)
+  return num_one / num_two
+end
+
+def exponential(num_one, num_two)
+  return num_one ** num_two
+end
+
+puts ""
+puts "\nWhat would you like to do?"
+option = gets.chomp.downcase
+
+until calculator_options.include?(option)
+  puts "\nInvalid entry. Try again.\n"
+  print "\nWhat would you like to do?"
+  option = gets.chomp.downcase
+end
+
+puts "\nWhat is the first number?"
+num_one = gets.chomp
+
+puts "\nWhat is the second number?"
+num_two = gets.chomp
+
+# first_number << num_one
+# second_number << num_two
+
+puts ""
+# Integer check
+
+# while num_one.integer? && num_two.integer?
+
+case option
+  when "add", "+"
+    calculate_addition_f = addition(num_one.to_f, num_two.to_f)
+      p calculate_addition_f
+
+  when "subtract", "-"
+    calculate_subtraction_f = subtraction(num_one.to_f, num_two.to_f)
+      p calculate_subtraction_f
+
+  when "multiply", "*"
+    calculate_multiplication_f = multiplication(num_one.to_f, num_two.to_f)
+      p calculate_multiplication_f
+
+  when "divide", "/"
+    if num_two == "0"
+       puts "Does Not Exist"
+    else
+    calculate_division_f = division(num_one.to_f, num_two.to_f)
+      p calculate_division_f
+    end
+
+  when "exponent", "**"
+    calculate_exponential_f = exponential(num_one.to_f, num_two.to_f)
+      p calculate_exponential_f
+end
+# end