See the following topics:

• IDL Tips and Tricks
• Automatic Garbage Collection
• CASE Versus SWITCH
• Compound Statements
• Definition of True and False
• Using Formatted Input and Output
• FORTRAN-Style Format Codes
• C printf-Style Format Codes
• Implied Print
• Jump Statements
• Regular Expressions
• Reserved Words
• Special Characters
• Using HELP with Structures