4.7 Loop Facility

A common complaint with Lisp’s traditional looping constructs was that they were either too simple and limited, such as dotimes or while, or too unreadable and obscure, like Common Lisp’s do loop.

To remedy this, Common Lisp added a construct called the “Loop Facility” or “loop macro”, with an easy-to-use but very powerful and expressive syntax.

• Loop Basics
• Loop Examples
• For Clauses
• Iteration Clauses
• Accumulation Clauses
• Other Clauses