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Loop until user input is correct

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# 1  
Old 07-09-2008
Loop until user input is correct
Hello, i know how to retrieve a user input (read), and how to manage the different options (case statement).

But... could anybody show me a script that, if the user option is incorrect, don't allow to continue the excution, i.e., if the value entered is not 1 or 2, the script shows a question.

Code:
echo "Values by the default? type 1 New values? type 2"
read options
case "$options" in
    1)
         echo "Values by default";
         ;;
    2)
         echo "New values";
         ;;
    *)
         echo "Incorrect value option, please enter the correct value";
         ;;
esac

I don't know how to loop, to allow the user to enter the new value. Thank you in advanced.
Last edited by radoulov; 07-09-2008 at 10:04 AM.. Reason: added code tags
# 2  
Old 07-09-2008
Code:
printf "Values by the default? type 1 New values? type 2: "
while read options; do
  case "$options" in
    1) printf "Values by default\n"; break ;;
    2) printf "New values\n"; break ;;
    *) printf "Incorrect value option!\nPlease enter the correct value: " ;;
  esac
done

# 3  
Old 07-09-2008
Quote:
Originally Posted by radoulov
Code:
printf "Values by the default? type 1 New values? type 2: "
while read options; do
  case "$options" in
    1) printf "Values by default\n"; break ;;
    2) printf "New values\n"; break ;;
    *) printf "Incorrect value option!\nPlease enter the correct value: " ;;
  esac
done

It works like a charm. This forum is incredible... thank you very much!!!
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