global

Access global variables from within a procedure.

Syntax

global ?varName ...?

Parameters

• varName: One or more global variable names to link

Description

Creates local variables that refer to global namespace variables of the same name. Only meaningful inside procedures—at the global level, it has no effect. Changes to the local variable affect the global variable.

Examples

Accessing a global variable

Output

Multiple global variables

Output

Global vs local scope

Output

See Also

• variable - Declare namespace variables
• upvar - Reference variables in other frames
• namespace - Create and manipulate namespaces