OPTION BASE
Revision as of 14:39, 28 April 2011 by imported>Clippy
The OPTION BASE statement is used to set the default lower bound of arrays.
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 be used before any array declarations (DIM).
- 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 such as: DIM array(5 TO 10)
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
