how to create a do-while loop using bash?

Question

I want the Menu to run once and then ask if the user wants it to run again, if they say yes it it continues to run until they say no. I saw some examples online but im not understanding how to implement it.

#Menu
echo "Menu"
echo "1. Display the message that indicates when the <script> command stared"
echo "2. Dispay the message that indicates when the <script> command terminated"
echo "3. game score"
read answer

if[[ $answer == 1 ]]; then
 echo""
elif[[ $answer == 2 ]]; then
 echo""
elif [[ $answer == 3]]; then
fi

echo "Do you want to repeat this routine?(Y/N)"
read yesno

clt60 · Accepted Answer · 2017-03-10 22:45:03Z

3

Other approach:

#the action functions
do_script_start() {
    echo "this is a message - start"
}
do_script_term() {
    echo "this is a message - term"
}
do_score() {
    echo "this is a game score"
}

# main 
ans=(
"Display the message that indicates when the <script> command stared"
"Dispay the message that indicates when the <script> command terminated"
"game score"
"exit menu"
)
PS3="Select what you want>"
select answer in "${ans[@]}"
do
case "$REPLY" in
    1) do_script_start ;;
    2) do_script_term ;;
    3) do_score ;;
    4) break ;;
esac
done
echo "here..."

answered Mar 10, 2017 at 22:45

clt60

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4 Comments

George Vasiliou Over a year ago

By PS3="Select what you want" you refer to the bash internal variable PS3?

clt60 Over a year ago

@GeorgeVasiliou yes, the PS3 is used as select prompt.

G3Spin Over a year ago

I wanted to run the menu first, then once they selected their choice(either 1, 2, or 3) and it executed, it would ask if it wanted to run the menu again. can that be done?

clt60 Over a year ago

@G3Spin of course. it can be done. And in my answer you could find every needed piece...

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