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#### 6.1.1 Overview of the Loop Facility

The loop macro performs iteration.

• Simple vs Extended Loop |  |
• Simple Loop |  |
• Extended Loop |  |
• Loop Keywords |  |
• Parsing Loop Clauses |  |
• Expanding Loop Forms |  |
• Summary of Loop Clauses |  |
• Summary of Variable Initialization and Stepping Clauses |  |
• Summary of Value Accumulation Clauses |  |
• Summary of Termination Test Clauses |  |
• Summary of Unconditional Execution Clauses |  |
• Summary of Conditional Execution Clauses |  |
• Summary of Miscellaneous Clauses |  |
• Order of Execution |  |
• Destructuring |  |
• Restrictions on Side-Effects |  |