Expression

An expression is a piece of code that returns a value.

Types of Expressions

An expression can be:

• variable
• operation
• scripting command
• control structure

Variable

An expression can be a simple variable (identifier):

Examples:

_myVariable
globalVariable

Operation

An expression can be an operation including its operands.

Examples:

5 * 6
a % 2
b * c

Scripting Command

An expression can be a scripting command returning a value including its arguments.

Examples:

count myArray
position unit1

Control Structure

An expression can be a control structure returning a value.

Examples:

if (myCondition) then {myValueA} else {myValueB}

=> returns myValueA or myValueB