Completed Program

' Create the array
PRINT "How many days to average?"
INPUT NUM
DIM RAIN( 1 TO NUM )

' Collect each day's rainfall
FOR COUNT = 1 TO NUM
  PRINT "Input rain for day number "; COUNT
  INPUT RAIN( COUNT )
NEXT COUNT

' Add up the rainfall for each day
LET SUM = 0.0
FOR COUNT = 1 TO NUM
  LET SUM = SUM + RAIN( COUNT )
NEXT COUNT

' Compute and print the average
LET AVERAGE = SUM / NUM
PRINT "The average rainfall is: "; AVERAGE

END