Answer:

Statement 1, LET NUM = 100 starts NUM at 100.

The DO statement, DO WHILE NUM <= 105 executes loop body as long as NUM is less than or equal to 105.

Statement 4, LET NUM = NUM + 1 increases NUM by one each time.

Selecting a Range of Integers

You can select the range of integers you want. Say that you want to count up from first to last. For example, if first is 50 and last is 55 you want 50, 51, 52, 53, 54, and 55. Here is how the loop is written:

The first number goes in the initial LET statement.
The last number is tested for in the DO WHILE statement.
- The loop condition must be: something <= last
The amount to increase the number each time is in the LET statement in the loop body.

(There are other ways to combine statements in loops than what we have been doing. These three points do not apply to all combinations.)

QUESTION 19:

Here is another change to the program. Think about how it illustrates these three points:

' Loop with a loop condition
'
LET NUM   = 25         'Statement 1

DO WHILE NUM <= 30     'Statement 2
  PRINT NUM            'Statement 3
  LET NUM = NUM + 1    'Statement 4
LOOP 

END

What will this new program print on the monitor screen?