Zero Repetitions of the Loop Body

It is perfectly OK to ask a program to do something zero times. This is like asking your car's windshield wipers to wipe the windshield zero times on a sunny day.

Here is how the zero repetitions come about. The number 0 will be stored in ENDVALUE:

PRINT "How many times do you want to print Hello"
INPUT ENDVALUE

Now COUNT will start out at 1:

LET COUNT = 1

Now the DO WHILE statement acts like a gatekeeper to see if execution is allowed to enter the loop body:

DO WHILE COUNT <= ENDVALUE

The contents of COUNT is compared to the contents of ENDVALUE. This is like replacing the variables with the values inside of them:

DO WHILE 1 <= 0

1 <= 0 is false, so execution does not enter the loop, and the next statement after the LOOP is executed: END. The program stops, as it should.