This command is part of the [TclX] package.

    :   '''mainloop'''
This procedure sets up a top‐level event loop.  Events are  processed  until  there  are no more active event sources, at which time the process exits.  It is used to build event oriented programs  using the TclX shell in a style similar to that used with [wish].  If the global variable [tcl_interactive] exists and  has  a true  value,  an  interactive command handler is started as well. If the command handler is terminated by an EOF, the process will be exited.

See also [commandloop] and [vwait].

----
!!!!!!
%| [Category Command%|%Command%|%] | [Category TclX%|%TclX%|%] |%
!!!!!!