title: Datatype to store integers and arithmetic operators?
body: <p>Is there any way that I can take input of numbers from users and also any arithmetic operator on a user choice when user wants to enter. I am basically trying to make a sort of calculator in which user will first enter numbers and in last the operators to be applicable on it. But there is no any fix limit that user will first input how many numbers. Its user wish. And my program should guess by itself that is it a character input or a integer input. Is it possible ??</p>