Cold Help System: Programming: ColdC Reference Manual: Language Structure: Expressions: Operators: Operator Precedence

When the interpreter executes an expression it evaluates each operator it in a certain order. It is easy to write an expression which has an unclear order of evaluation. For instance, the expression A - B + C could be parsed as A - B followed by the result plus C or as A minus B + C. To resolve these ambiguities, each operator has two properties when interpreted: precedence and association.

Precedence determines whether an operator is more important than another operator; for instance, A + B * C is equivalent to A + (B * C) because multiplication has higher precedence (is more important) than addition.

Association determines whether operators at the same precedence level associate left to right or right to left; A - B - C is equivalent to (A - B) - C because subtraction associates left to right.

Here is a list of operators grouped by precedence, in order from highest to lowest:

-- ++
! - (unary)
* / %
+ - (binary)
== != > >= < <=
= += -= /= *= ?=

All operators associate from left to right except the Logical Operators (&&, ||, and ?|), which associate from right to left. Parentheses may be used to group expressions and clarify evaluation.

Operator Precedence | Index Operators | Arithmetic Operators | Assignments | Logical Operators | Conditional | List Splice Operator

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