Build a List of Items to Loop Over

Build a list with comments:

list=""
list+=" git"            # version control
list+=" vim"            # text editor
list+=" hdparm"         # hard drive tools
list+=" nmap"           # network debugging
list+=" fail2ban"       # brute-force protection

for F in ${list}
do
    echo ${F}
    done

Or if you want to keep it simple:

list="
    git
    vim
    hdparm
    nmap
    youtube-dl
    fail2ban
"

for F in ${list}
do
    echo ${F}
done