Tcl8.6.11/Tk8.6.11 Documentation > Tcl Commands > break

Tcl/Tk Applications | Tcl Commands | Tk Commands | [incr Tcl] Package Commands | SQLite3 Package Commands | TDBC Package Commands | tdbc::mysql Package Commands | tdbc::odbc Package Commands | tdbc::postgres Package Commands | tdbc::sqlite3 Package Commands | Thread Package Commands | Tcl C API | Tk C API | [incr Tcl] Package C API | TDBC Package C API

NAME

break — Abort looping command

SYNOPSIS

break

DESCRIPTION

This command is typically invoked inside the body of a looping command such as for or foreach or while. It returns a 3 (TCL_BREAK) result code, which causes a break exception to occur. The exception causes the current script to be aborted out to the innermost containing loop command, which then aborts its execution and returns normally. Break exceptions are also handled in a few other situations, such as the catch command, Tk event bindings, and the outermost scripts of procedure bodies.

EXAMPLE

Print a line for each of the integers from 0 to 5: 

for {set x 0} {$x<10} {incr x} {
    if {$x > 5} {
        break
    }
    puts "x is $x"
}

SEE ALSO

catch, continue, for, foreach, return, while

KEYWORDS

abort, break, loop
Copyright © 1993-1994 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.