ANSI Common Lisp   6 Iteration

6.1 The LOOP Facility

6.1.1  Overview of the Loop Facility
6.1.2  Variable Initialization and Stepping Clauses
6.1.3  Value Accumulation Clauses
6.1.4  Termination Test Clauses
6.1.5  Unconditional Execution Clauses
6.1.6  Conditional Execution Clauses
6.1.7  Miscellaneous Clauses
6.1.8  Examples of Miscellaneous Loop Features
6.1.9  Notes about Loop