diff --git a/calculator_final.rb b/calculator_final.rb
new file mode 100644
index 0000000..2aa508e
--- /dev/null
+++ b/calculator_final.rb
@@ -0,0 +1,56 @@
+#Add,Subtract,Multiply,Divide Methode
+def operation(num_one, math_operation, num_two)
+  if math_operation == "Add" || math_operation == "+"
+      result = ((num_one.to_f) + (num_two.to_f)).round(2)
+  elsif math_operation == "Subtract" || math_operation == "-"
+      result = ((num_one.to_f) - (num_two.to_f)).round(2)
+  elsif math_operation == "Multiply" || math_operation == "*"
+      result = ((num_one.to_f) * (num_two.to_f)).round(2)
+  elsif math_operation == "Divide" || math_operation == "/"
+      result = ((num_one.to_f) / (num_two.to_f)).round(2)
+end
+return result
+end
+
+#Validate if input is an math operator
+def ValidOperator (math_operation)  
+until ["Add","+", "Subtract","-", "Multiply", "*", "Divide", "/"].include? math_operation
+puts "Enter a valid selection"
+math_operation = gets.chomp
+end
+return math_operation
+end
+
+#Validate if the input is Number
+def ValidNumber (number)
+  until (Integer(number) rescue nil) !=nil || (Float(number) rescue nil) !=nil #Returns nil if it is not integer or Float else returns number
+  puts "Enter a valid number"
+  number = gets.chomp.to_i
+end
+return number.to_i
+end
+
+#Program Start
+puts "Welcome to the Calcuator Program."
+
+operator_array = ["Add(+)", "Subtract(-)", "Multiply(*)", "Divide(/)"]
+puts operator_array
+
+#Accept operator input
+puts"Please enter the operator would you like to use?"
+math_operation = gets.chomp
+math_operation = ValidOperator(math_operation)
+
+#Accept first number
+puts "Enter your first number."
+num_one = gets.chomp.to_i
+num_one = ValidNumber(num_one)
+
+#Accept second number
+puts "Enter your second number."
+num_two = gets.chomp.to_i
+num_two = ValidNumber(num_two)
+
+
+final_result = operation(num_one, math_operation, num_two)
+puts "Result is #{final_result}"