Postfix notation, also referred to as Reverse Polish notation is a different method of representing arithmetic expressions that places the operator after the operands. Reading and writing with infix notation is straightforward for humans, but parsing it can be challenging for computers. As an illustration, the operator “+” is positioned in the middle of the equation “2 + 3,” with the operands “2” and “3” on either side of it. This notation is also used in programming languages. Infix notation is a standard form of constructing arithmetic expressions in which the operator is placed between the operands. We will discuss both kinds of notations and we will also discuss the algorithm for the conversion of infix to postfix using stack data structures. We, as a human, are good at interpreting infix notation, but computer evaluates the expression in postfix form. Infix to postfix conversion is very common in expression evaluation on computers.
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