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I am trying to print all directories and sub directories with a recursive function but I get only the first directory. Any help?

I am trying to print all directories and sub directories with a recursive function but I get only the first directory. Any help?

counter(){
    list=`ls $1`
    if [ -z "$(ls $1)" ]
    then 
        exit 0
    fi
    echo $list
    for file in $list
    do 
      if [ -d $file ]
      then 
            echo $file
            counter ./$file
      fi
    done
}

counter $1