Texas Instruments TI-99/4A - Page 132

OPTION BASE
OPTION BASE f ~}
The OPTION BASE statement allows you to set the lower limit of
array subscripts at one instead of zero. You can omit the OPTION
BASE statement if you want the lower limit of the subscripts to be
zero.
If you include an OPTION BASE statement in your program, you
must
give it a lower line number than any DIMension statement
or any reference to an element 10 any array. You may have
only one OPTION BASE statement in a program. and it
applies
to a11 array subscripts in your program Therefore, you
cannot have
one array subscript beginning with 0 and another
beginning with 1 in the same program.
If you use some integer other than one or zero in the OPTION
BASE statement, the computer will stop the program and print
"INCORRECT STATEMENT.'·
11·112
Examples:
>NEW
>100 OPTION BASE 1
>110 VIM X(5,5,5)
>120 X(1,0,1l"3
>130 PRINT X(1,0,1l
>140 END
;'RU N
* BAD SUBSCRIPT IN 120
>1 00 ENTER
>RU N
3
•• DONE
User's Reference Guide