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(librep.info)Control Structures

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Control Structures
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   Control structures are special forms or macros that control _which_
forms get evaluated, _when_ they get evaluated and the _number_ of
times to evaluate them. This includes conditional structures, loops,
etc...

   The simplest control structures are the sequencing structures; they
are used to evaluate a list of forms in left to right order.

Sequencing Structures

Evaluating several forms in sequence

Conditional Structures

Making decisions based on truth values

Looping Structures

`while' loops

Non-Local Exits

Exiting from several levels of evaluation

Continuations

Capturing the call stack