Commodore Plus 4 - Page 144

ried away. To figure the number of variables created with each DIM,
multiply the total number of elements in each dimension of the array.
(Each array starts with element 0.)
NOTE: Integer (single-digit) arrays take up 2/5ths of the space of
floating point arrays.
EXAMPLE:
10 DIM A${40),B7(15),CC%(4,4,4)
L t 1
41 Elements 16 Elements 125 Elements
—
DO/
LOOP/
WHILE/
UNTIL/
EXIT
You can dimension more than one array in a DIM statement by sepa
rating the arrays by commas. If the program executes a DIM statement
for any array more than once, you'll get a re'DIMed array error mes
sage. It is good programming practice to place DIM statements near
the beginning of the program.
DO| UNTIL boolean argument WHILE boolean argument \ state
ments |EXIT|
LOOP | UNTIL boolean argument WHILE boolean argument\
Performs the statements between the DO statement and the LOOP
statement. If no UNTIL or WHILE modifies either the DO or the LOOP
statement, execution of the intervening statements continues indefi
nitely. If an EXIT statement is encountered in the body of a DO loop,
execution is transferred to the first statement following the LOOP
statement. DO loops may be nested, following the rules defined for
FOR-NEXT loops. If the UNTIL parameter is used, the program con
tinues looping until the boolean argument is satisfied (becomes
TRUE). The WHILE parameter is basically the opposite of the UNTIL
parameter: the program continues looping as long as the boolean
argument is TRUE. An example of a boolean argument is A=1. or
G>=65.
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