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#### 6.1.1.8 Summary of Variable Initialization and Stepping Clauses

The `for` and `as` constructs provide iteration control clauses that establish a variable to be initialized. `for` and `as` clauses can be combined with the loop keyword `and` to get parallel initialization and stepping_1. Otherwise, the initialization and stepping_1 are sequential.

The `with` construct is similar to a single let clause. `with` clauses can be combined using the loop keyword `and` to get parallel initialization.

For more information, see Variable Initialization and Stepping Clauses.