Tcl Built-In Commands
while - Execute script repeatedly as long as a condition is met
while test body
The while command evaluates test as an expression
(in the same way that expr evaluates its argument).
The value of the expression must a proper boolean
value; if it is a true value
then body is executed by passing it to the Tcl interpreter.
Once body has been executed then test is evaluated
again, and the process repeats until eventually test
evaluates to a false boolean value. Continue
commands may be executed inside body to terminate the current
iteration of the loop, and break
commands may be executed inside body to cause immediate
termination of the while command. The while command
always returns an empty string.
boolean value, loop, test, while
[ tcl8.0a1 | tk8.0a1 | X-ref ]
Copyright © 1989-1994 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.