PythonIntro_2-12a

print ("Choose what you want to do - add, subtract, multiply or divide.")
select = input (">>")
if select =="add" or select == "subtract" or select == "multiply" or select == "divide":
  print("What's the first number?")
  no1 = input (">>")
  number1 = int(no1)
  print("What's the second number?")
  no2 = input (">>")
  number2 = int(no2)
else:
  print("I don't know this function. Bye.")

if select == "add":
  Addresult = number1+number2
  Addoutput = str(Addresult)
  print (no1+"+"+no2+"="+Addoutput)
  print ("bye")
elif select == "subtract":
  Subtractresult = number1-number2
  Subtractoutput = str(Subtractresult)
  print (no1+"-"+no2+"="+Subtractoutput)
  print ("bye")
elif select == "multiply":
  Mulresult = number1*number2
  Muloutput = str(Mulresult)
  print (no1+"*"+no2+"="+Muloutput)
  print ("bye")
elif select == "divide":
  Divresult = number1/number2
  Divoutput = str(Divresult)
  print (no1+"/"+no2+"="+Divoutput)
  print ("bye")