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Expressions | Documentation

docs.swift.org · 92 words · saved by 1 readers

In Swift, there are four kinds of expressions: prefix expressions, infix expressions, primary expressions, and postfix expressions. Evaluating an expression returns a value, causes a side effect, or both. Prefix and infix expressions let you apply operators to smaller expressions. Primary expressions are conceptually the simplest kind of expression, and they provide a way to access values. Postfix expressions, like prefix and infix expressions, let you build up more complex expressions using postfixes such as function calls and member access. Each kind of expression is described in detail in the sections below. Grammar of an expression expression → try-operator? await-operator? prefix-expression infix-expressions? Prefix expressions combine an optional prefix operator with an expression. Prefix operators take one argument, the expression that follows them. For information about the behavior of these operators, see Basic Operators and Advanced Operators. For information about the operat

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