/media/sda-magnetic/david/Extern-Magnetic-2022-06-29/Extern01/Dokumente-2021-05-8/disk10-ab-2020-01-10/02-debian-pc2-work/informatik/bash-programming/lex-yacc-bash-etc/bash0010.sh

#!/bin/bash 

echo $(( 4 ))
echo $(( 4+4 ))
echo $(( 4 + 4 ))
echo $(( ((4 + 2)*6+1)*8 ))

var1=34
echo $(( ($var1+2)*3 ))

typeset -i var2=34
echo $(( ($var2+2)*3 ))

typeset -i var3=50

while [ $var1 -le 50 ]
do
   echo $(( $var1 ))
   var1=$(( $var1+1 ))
done

var1=20

while [ $var1 -le $var3 ]
do
   echo $(( $var1 ))
   var1=$(( $var1+1 ))
done

while [ $var1 -ge 20 ]
do
   echo $(( $var1 ))
   var1=$(( $var1-1 ))
done