Examples

The examples are instructive and detail the related error messages that appear if you try the examples.

In very rare cases, some examples that syntactically must occur on the same line may appear on multiple lines for typesetting purposes. In the case of those examples the continued lines are indented by a quarter of an inch.

The examples make frequent use of literals in an attempt to focus the reader's attention on particular points. In normal usage variables are used far more frequently than literals.