diff --git a/calculator.rb b/calculator.rb
new file mode 100644
index 0000000..49ec7a2
--- /dev/null
+++ b/calculator.rb
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+# ruby calculator
+
+#operator
+puts "Welcome to the Calculator program! Which operator would you like to use?
+1. add(+)
+2. subtract(-)
+3. multiply (*)
+4. divide(/)
+Please choose one operator (name or symbol): "
+math_operator = gets.chomp
+
+
+#number 1
+puts "Choose the first number for the math operation: "
+num_one = gets.chomp.to_i
+
+
+# number 2
+puts "Choose the second number for the math operation: "
+num_two = gets.chomp.to_i
+
+until ["add", "+", "subtract", "-", "multiply", "*", "divide", "/"].include?(math_operator)
+    puts "Please tell me to add (+), subtract (-), multiply (*), or divide (/)!"
+    math_operator = gets.chomp
+end
+
+
+case math_operator
+when "add", "+"
+  puts num_one + num_two
+when "subtract", "-"
+  puts num_one - num_two
+when "multiply", "*"
+  puts num_one * num_two
+when "divide", "/"
+  puts num_one / num_two
+end
+
+
+
+