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Operator Associativity

• The operator associativity rules for expression evaluation define the order in which adjacent operators with the same precedence level are evaluated

• Typical associativity rules:
  • Left to right, except **, which is right to left
  • Sometimes unary operators associate right to left (e.g., FORTRAN)

• APL is different; all operators have equal precedence and all operators associate right to left

• Can be overridden with parentheses