while ! [ "${finished}" ]; do

    ...

done

#!/bin/sh

INPUT_STRING=hello

while [ "$INPUT_STRING" != "bye" ]

do

  echo "Please type something in (bye to quit)"

  read INPUT_STRING

  echo "You typed: $INPUT_STRING"

done

while true;

do

    #code

done

#!/bin/sh

​

a=0

​

while [ $a -lt 10 ]

do

   echo $a

   a=`expr $a + 1`

done

while true;

do

    #code

;done

#!/bin/bash

i=0

While [ $i -le 10 ]

do

 echo i:$i

 ((i+=1))

done

#!/bin/bash

X=0

while [ $X -le 20 ]

do

    echo $X

    X=$((X+1))

done

#!/bin/bash

counter=$1

factorial=1

while [ $counter -gt 0 ]

do

   factorial=$(( $factorial * $counter ))

   counter=$(( $counter - 1 ))

done

echo "$factorial"

while true; do your_command; sleep5; done