How do I prompt for Yes/No/Cancel input in a Linux shell script?

Question

I want to pause input in a shell script, and prompt the user for choices.
The standard Yes, No, or Cancel type question.
How d

Answer 1

Inspired by the answers of @Mark and @Myrddin I created this function for a universal prompt

uniprompt(){
    while true; do
        echo -e "$1\c"
        read opt
        array=($2)
        case "${array[@]}" in  *"$opt"*) eval "$3=$opt";return 0;; esac
        echo -e "$opt is not a correct value\n"
    done
}

use it like this:

unipromtp "Select an option: (a)-Do one (x)->Do two (f)->Do three : " "a x f" selection
echo "$selection"