![]() Complex expressions using standard parenthesized infix notation are often more readable than the corresponding postfix expressions. Though postfix expressions are easily and efficiently evaluated by computers, they can be difficult for humans to read. ![]() Postfix notation, also known as reverse Polish notation, is a syntax for mathematical expressions in which the mathematical operator is always placed after the operands. When an operator is followed for every pair of operands. Postfix expression: The expression of the form a b op. When an operator is in-between every pair of operands. Infix expression: The expression of the form a op b. ![]()
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