Expressions

An expression is a series of AppleScript words that corresponds to a value. Expressions are used in scripts to represent or derive values. When you run a script, AppleScript converts its expressions into values. This process is known as evaluation.

Two common types of expressions are operations and variables. An operation is an expression that derives a new value from one or two other values. A variable is a named container in which a value is stored. The following sections introduce operations and variables.

Operations
Variables

For more information about these and other types of expressions, see Expressions