This tag is for questions about calculators.
Calculator questions have the basic concept that it supports the input of a sequence of values and operators, and the program computes the result. The format used for the input, whether it is Postfix (also called RPN - Reverse Polish Notation) like 3 4 + or Infix like 3 + 4 should be clarified in the question.
Visit the Wikipedia for Software Calculators for more information on implementation, history, etc.
