Case Statement not exporting variable

Question

I am having issues with my case statement not returning values. I am new to using cases and not a computer programmer. Any advice is helpful

############################# Chose GrADS or OpenGrADS #########################
while true; do
  read -p "Would you like to install OpenGrADS or GrADS? (OpenGrADS/GrADS)" yn
  case $yn in
    [OpenGrADS]* )
      export GRADS_PICK=1    #variable set for grads or opengrads choice
      break
      ;;
    [GrADS]* )
      export GRADS_PICK=2   #variable set for grads or opengrads choice
      break
      ;;
    * )
    echo " "
    echo "Please answer OpenGrADS or GrADS (case sensative).";;
  esac
done

Answer 1

Your code is almost correct, your mistake was how you checked the input. Be careful with * because it's a special character in most of the programming languages and especially bash/unix.

while read -p "Would you like to install OpenGrADS or GrADS? (OpenGrADS/GrADS)" yn; do

  case $yn in
  OpenGrADS)
    echo "first choice"
    export GRADS_PICK=1    #variable set for grads or opengrads choice
    break
    ;;
  GrADS)
    echo "second choice"
    export GRADS_PICK=2   #variable set for grads or opengrads choice
    break
    ;;
   * )
   echo " "
   echo "Please answer OpenGrADS or GrADS (case sensative).";;
esac
done

EDIT: quotes aren't necessary. (thanks chepner and Gordon Davisson)