Linux and Unix until and while

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About until, while
Syntax
Examples
Related commands
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About until and while

Shell built-in functions to repetitively execute a set of actions while/until conditions are evaluated TRUE.

Syntax

while [ conditions ] ; do actions ; done
until [ conditions ] ; do actions ; done

Examples

filename=anything
while [ $filename ]
do
echo "file?"
read filename # read from terminal find . -name $filename -print
done

User is repeated prompted for a name of a file to be located, until the user chooses to finish execution.

Related commands

break
csh
ksh
sh