Usage: WHILE <boolean> { <cmd> }
This will execute the given cmd while the given boolean returns
true. The boolean has the same format as for the IF command, except
that it is re-evaluated at each loop interation. The same is true
for cmd. It is re-evaluated at each loop interation.
Example (in script format):
alias repeat
@ rep = 0;
while (rep < [$0])
@ rep = rep + 1
assign -rep

This can be used as follows:
/repeat 10 /msg bigcheese This repeats 10 times
The repeat alias breaks down into three parts.

@ rep = 0
while (rep < [$0]) {$1-;@ rep = rep + 1}
assign -rep

The first is to initialize rep to 0 and the last part is to remove
rep when done. The first is just like ASSIGN rep 0
The WHILE portion is described below:
The boolean for the while loop is (rep < [$0]).
This is what is then used at each loop interation. At the
first iteration this will be ( 0<10 ), at the next ( 1<10 ), and so on.
The cmd part of this looks like {$1-;@ rep = rep + 1}
When the alias is first parsed, the stuff inside {..} is not expanded but
is simply executed at each loop interation. It expands to
'msg bigcheese This repeats 10 times.;@ rep = rep + 1'
It sends the MSG to BigCheese and then it increments rep by 1.
(See HELP @ for more information about this assignment)

The command part while is exactly like the syntax in IF

See Also:

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