Idiomatically determine all the characters that can be used for symbols: Difference between revisions

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Idiomatically determine all the characters that can be used for ''symbols''.
The word ''symbols'' is meant things like names of variables, procedures (i.e., named fragments of programs, functions, subroutines, routines), statement labels, events or conditions, and in general, anything a computer programmer can choose to ''name'', but not being restricted to this list. ''Identifiers'' might be another name for ''symbols''.
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