What are infix and postfix notations?

Answer 1

Infix, Post fix and Prefix notations are three different but equivalent ways of writing expressions.

Infix notation: X + Y
Operators are written in-between their operands

Postfix notation (also known as "Reverse Polish notation"): X Y +
Operators are written after their operands.

Prefix notation (also known as "Polish notation"): + X Y
Operators are written before their operands.

Answer 2

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