TextWindow.Title = "Letter Grades"
TextWindow.WriteLine("How many grades do you want to enter")
Number_Grades=TextWindow.ReadNumber()
TextWindow.WriteLine("Enter " + Number_Grades + " grades:")
For i = 1 To Number_Grades
  grades[i] = TextWindow.ReadNumber()
EndFor

For i = 1 To Number_Grades
  If grades[i] >= 90 And grades[i] <= 100 Then
    TextWindow.WriteLine("Your grade for " + grades[i] + " is: A")
  ElseIf grades[i] >=80 And grades[i] <=89 Then
    TextWindow.WriteLine("Your grade for " + grades[i] + " is: B")
  Elseif grades[i] >100 then
    TextWindow.WriteLine("Your grade is invalid")
  Else
  TextWindow.WriteLine("Your grade for " + grades[i] + " is: F")
Endif
EndFor