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Symbols
in as
A
symbol is one or more characters chosen from the set of all letters
(both upper and lower case), digits and the three characters ‘_.$’.
On most machines, you can also use $
in symbol names; exceptions are noted in Machine
dependent features.
-
Warning:
No symbol may begin with
a digit. Case is significant. There is no length limit: all characters
are significant.
Symbols
are delimited by characters not in that set, or by the beginning of a file
(since the source program must end with a newline, the end of a file is
not a possible symbol delimiter).
See
the following documentation for more discussion.
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