The remaining sections of this chapter describe the constructs that the
Loop Facility provides. The descriptions are organized according to the
functionality of the constructs. Each section begins with a general
discussion of a particular operation; it then presents the constructs
that perform the operation.
Section 26.6,
``Iteration Control,’’ describes iteration control clauses that allow
directed loop iteration.
Section 26.7, ``End-Test
Control,’’ describes clauses that stop iteration by providing a
conditional expression that can be tested after each execution of the
loop body.
Section 26.8, ``Value
Accumulation,’’ describes constructs that accumulate values during
iteration and return them from a loop. This section also discusses ways
in which accumulation clauses can be combined within the Loop
Facility.
Section 26.9, ``Variable
Initializations,’’ describes the with construct, which
provides local variables for use within the loop body, and other
constructs that provide local variables.
Section 26.10,
``Conditional Execution,’’ describes how to execute loop clauses
conditionally.
Section 26.11,
``Unconditional Execution,’’ describes the do and
return constructs. It also describes constructs that are
used in the loop prologue and loop epilogue.
Section 26.12,
``Miscellaneous Features,’’ discusses loop data types and destructuring.
It also presents constructs for naming a loop and for specifying initial
and final actions.
