What is "infix notation"

infix notation \in"fix no*ta"tion\, n. (Computers) A notation for commands or instructions in which the operator is inserted between the terms on which it operates. Contrasted with prefix notation and postfix notation.

n. (context mathematics English) Notation where operators appear between operands, for example ''a''+''b''

n. a notation for forming mathematical expressions using parentheses and governed by rules of operator precedence; operators are dispersed among the operands

Infix notation is the notation commonly used in arithmetical and logical formulae and statements. It is characterized by the placement of operators between operands – " infixed operators" – such as the plus sign in "2 + 2".