If_line
A constant of type Logical,
a variable of type Logical, or an expression that evaluates to
a Logical.
The statements of the branch are executed if the condition
evaluates to True, otherwise they are skipped.
One of the following:
- an ordinary Garfield command such as a section header,
a section command or a sub-section command;
- the start of a loop;
- a procedure call.
The statement of an If line may not be itself an If line.
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Formatted on 15/01/01 at 23:07.
