A '''[Dodekalogue%|%routine]''' is the implementation of a [command].  It is
the thing Tcl uses the first word of a command to find and execute in order to
evaluate that command, and also the entire execution of that thing.  Thus it
includes, for example, both the low-level dispatch mechanism for a command
defined using `[proc]`, and also the evaluation of the body of the procedure.

In the case of built-in commands, the "dispatch mechnism" is usually merely a C
function associated with a command name.


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