Loop clauses fall into one of the following categories:
6.1.1.5.1 Summary of Variable Initialization and Stepping Clauses
6.1.1.5.2 Summary of Value Accumulation Clauses
6.1.1.5.3 Summary of Termination Test Clauses
6.1.1.5.4 Summary of Unconditional Execution Clauses
6.1.1.5.5 Summary of Conditional Execution Clauses
6.1.1.5.6 Summary of Miscellaneous Clauses