The Count Changes Automatically

Here is a diagram that shows how the COUNT changes as the program runs:

' Counting Loop---using a FOR
'
'                    values of COUNT changing over time --->
' 
FOR COUNT = 0 TO 2   0        1         2         3
  PRINT COUNT          0         1         2
NEXT COUNT                1         2         3
END

• COUNT starts out at 0, stays 0 for the PRINT statement, then changes to 1 at the NEXT COUNT statement.
• Execution returns to the top of the loop
• AT the top of the loop COUNT is 1, it stays 1 for the PRINT statement, then changes to 2 at the NEXT COUNT statement.
• Execution returns to the top of the loop
• At the top of the loop (again) COUNT is 2, it stays 2 for the PRINT statement, then changes to 3 at the NEXT COUNT statement.
• Execution returns to the top of the loop
• Now at the top of the loop it is 3, but 3 is greater than the ending count 2, so the loop is exited.