Global Variables

Variable Scope:

The scope of a variable refers to what part of the program a variable and its value can be used.

• Local variables - only declared and used in procedure or function they are created in
• Global variables - declared after the public class statement or within a module and available to all functions procedures in the code.

To create global variables in XOJO we must use with the XOJO GUI. Global variables/modules are not created directly in code.

Modules in XOJO:

A module is a collection of project items, usually containing methods/functions, properties, and constants. Once created they always exist within a project.

• Modules contain properties that act as our variables.
• A property is a variable that belongs to a class or module.

Create a Module in XOJO:

• Go to the menu bar click Insert
• Select Module from the drop-down menu
• Name the module
• Do not include spaces in the module name!

Add a Property to the Module:

• Select the module in the navigator
• Click on Insert from the Menu Bar
• Select Property
  • On the right side:
  • Give it a name
  • Give it a type (integer, double, string)
  • Set default value
  • Set scope to global