NAME

       exit - End the application

SYNOPSIS

       exit ?returnCode?
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DESCRIPTION

       Terminate  the  process,  returning  returnCode  to  the  system  as  the exit status.  If
       returnCode is not specified then it defaults to 0.

EXAMPLE

       Since non-zero exit codes are usually interpreted as error cases by the  calling  process,
       the  exit  command  is an important part of signaling that something fatal has gone wrong.
       This code fragment is useful in scripts to act as a general problem trap:

              proc main {} {
                  # ... put the real main code in here ...
              }

              if {[catch {main} msg options]} {
                  puts stderr "unexpected script error: $msg"
                  if {[info exist env(DEBUG)]} {
                      puts stderr "---- BEGIN TRACE ----"
                      puts stderr [dict get $options -errorinfo]
                      puts stderr "---- END TRACE ----"
                  }

                  # Reserve code 1 for "expected" error exits...
                  exit 2
              }

SEE ALSO

       exec(3tcl)

KEYWORDS

       abort, exit, process