
# File: ifthen3   ==========================================

if [ -w weather_data ]
then
   cat newdata >> weather_data
   if [ $? -eq 0 ]
   then
      echo "Successfully appended new data."
   else
      echo "Failed to append new data."
   fi
else
   echo "Cannot write to weather_data file."
   echo "It may not exist."
fi

