In test case 1, when a "~" is passed in as a parameter it is substituted 
for $HOME and the script works.
In test case 2, when no parameter is passed and the "~" is assigned to 
the var $directory using the read command, $HOME is not substituted for 
"~" and the script does not work.
How do I get test case 2 to work?
bash shell script named green:
     directory=$1
     if [[ $directory = "" ]]
     then
         echo -n "prompt for dir: "
         read directory
     fi
     echo "dir = "$directory
     pwd
     cd $directory
     pwd
Test case 1 output:
$ green ~
dir = /home/jan
/home/jan/bin
/home/jan
Test case 2 output:
$ green
prompt for dir: ~
dir = ~
/home/jan/bin
/home/jan/bin/green: cd: ~: No such file or directory
/home/jan/bin
-- Jan Mason td376@mail.anonymizer.com
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