Shell Programming and Scripting

if [ $ur_variable -ge 0 ] && [ $ur_variable -le 8 ]
then
    echo "Num is between 0-8"
    
elif [ $ur_variable -ge 0 ] && [ $ur_variable -le 8 ]
then
    echo "Num is between 9-17"        

elif [ $ur_variable -ge 0 ] && [ $ur_variable -le 8 ]
then
    echo "Num is between 18-24"
fi

case $ur_variable
  "") echo "Not entered"
  [0-8]) echo "Num is between 0-8";break;
  [9-17]) echo "Num is between 9-17";break;
  [18-24]) echo "Num is between 18-24";break;
  *) echo "Non-Numeric or Alphabetic or Spl,chars or Not in range[0-24];break;
esac