IDL and Internal Variables

This section describes how variables are created and managed within IDL. While reading this section, you should refer to the following figure to see how each part fits into the overall structure of an IDL variable.

See the following topics:

• The IDL_VARIABLE Structure
• Scalar Variables
• Array Variables
• Structure Variables
• Heap Variables
• Temporary Variables
• Creating an Array from Existing Data
• Getting Dynamic Memory
• Accessing Variable Data
• Copying Variables
• Storing Scalar Values
• Obtaining the Name of a Variable
• Looking Up Main Program Variables
• Looking Up Variables in Current Scope
• Freeing Dynamic Resources