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  6 Iteration   6.1 The LOOP Facility   6.1.1 Overview of the Loop Facility   6.1.1.5 Summary of Loop Clauses

6.1.1.5.5 Summary of Conditional Execution Clauses

The if and when constructs take one form as a test and a clause that is executed when the test yields true. The clause can be a value accumulation, unconditional, or another conditional clause; it can also be any combination of such clauses connected by the loop and keyword.

The loop unless construct is similar to the loop when construct except that it complements the test result.

The loop else construct provides an optional component of if, when, and unless clauses that is executed when an if or when test yields false or when an unless test yields true. The component is one of the clauses described under if.

The loop end construct provides an optional component to mark the end of a conditional clause.

For more information, see Section 6.1.6 Conditional Execution Clauses.


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