Shell Programming and Scripting

dateToDays()
{
typeset total
 case $month in 
  "January") 
   month=1
   ;;
  "Febuary")
   month=2
   ;;
  "March")
   month=3
   ;;  
  "April")
   month=4
   ;;
  "May")
   month=5
   ;;
  "June")
   month=6
   ;;
  "July")
   month=7
   ;;
  "August")
   month=8
  ;;
  "September")
   month=9
   ;;
  "October")
   month=10
   ;;
  "November")
   month=11
   ;;
  "December")
  esc
 ((total=(month-1)*30+(day )+(1900-year)))
 return $total
}
# main program
echo enter month 
read month
echo enter day
read day
echo enter year
read year
dateToDays month day year
total = $?
echo the total days are $total