Difference between revisions of "OPTION BASE"
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imported>SMcNeill (Remove redundant info about the impossibility of using a keyword as a numeric variable as that's not exclusive to OPTION BASE. Also, it's stated elsewhere where relevant.) |
imported>Clippy |
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* Otherwise, arrays will be dimensioned from element 0 if you DIM just the upper bounds. | * Otherwise, arrays will be dimensioned from element 0 if you DIM just the upper bounds. | ||
* You can also set other array boundaries by using [[TO]] in the DIM declaration such as {{InlineCode}}DIM array(5 TO 10){{InlineCodeEnd}} | * You can also set other array boundaries by using [[TO]] in the DIM declaration such as {{InlineCode}}DIM array(5 TO 10){{InlineCodeEnd}} | ||
| + | * Note: '''OPTION''' and '''BASE''' cannot be used as numerical variable names. | ||
Revision as of 02:40, 19 October 2017
The OPTION BASE statement is used to set the default lower bound of arrays.
Contents
Syntax
- OPTION BASE {0|1}
Description
- This statement affects array declarations where the lower bound of a dimension is not specified.
- When used, OPTION BASE must come before any array declarations (DIM) to be affected.
- By default, the lower bound for arrays is zero, and may be changed to one using the statement.
- Otherwise, arrays will be dimensioned from element 0 if you DIM just the upper bounds.
- You can also set other array boundaries by using TO in the DIM declaration such as DIM array(5 TO 10)
- Note: OPTION and BASE cannot be used as numerical variable names.
Examples
Example 1: Set the default lower bound for array declarations to one.
OPTION BASE 1 ' Declare a 5-element one-dimensional array with element indexes of one through five. DIM array(5) AS INTEGER PRINT LBOUND(array)
1
Example 2: Set the default lower bound for array declarations to zero.
OPTION BASE 0 ' Declare an 18-element two-dimensional array with element indexes of zero through two ' for the first dimension, and 10 through 15 for the second dimension. DIM array(2, 10 to 15) AS INTEGER PRINT LBOUND(array, 1) PRINT LBOUND(array, 2)
0 10
See also
