expression

Template:Translate An expression is a non-productive rule that resolves by calculation into a value. They consist of at least one operand, and additional operands may be linked via non-unary operators. An operand may be

• a literal value of any type
• a variable or constant identifier, or
• a function call.

Examples of expressions are:

• x + 5
• 'Z'
• response <> 42

Expressions, and parts thereof, can be classified by their result type. Usually primarily arithmetic and logic expressions are distinguished. An arithmetic expression results in a numeric value. A logic expression results in a Boolean value.

remarks

With {$extendedSyntax on} a function call as an expression can appear as a statement, too.

see also

• article „expression“ in Wikipedia, the free online encyclopedia