Korn Shell Programming by Example

until

Official Description

Executes until a condition becomes true.

Syntax

until list ;do list ;done

Options

None

Oddities

An until loop is similar to a while loop, except that the test is negated.

Example

$ a=0
$
$ until (( $a==5 ))          # Loop until variable a contains a 5
> do
> print $a
> (( a=a+1 ))
> done
0
1
2
3
4
$ print $a                   # Variable a contains a 5 now
5