$DYNAMIC

The $DYNAMIC metacommand allows the creation of dynamic (changeable) arrays.

Syntax

{REM | ' } $DYNAMIC

Description

• QBasic metacommands require REM or apostrophe (') before them and are always placed at the start of the main module.
• Dynamic arrays can be resized using REDIM. The array's type cannot be changed.
• All data in the array will be lost when REDIMensioned except when _PRESERVE is used.
• REDIM _PRESERVE can preserve and may move the previous array data when the array boundaries change.
• _PRESERVE allows the upper and lower boundaries of an array to be changed. The number of dimensions cannot change.
• $DYNAMIC arrays must be REDIMensioned if ERASE or CLEAR are used as the arrays are removed completely.

Examples

Example: REDIMing a $DYNAMIC array using _PRESERVE to retain previous array values.

REM $DYNAMIC 'create dynamic arrays only DIM array(10) 'create array with 11 elements FOR i = 0 TO 10 array(i) = i: PRINT array(i); 'set and display element values NEXT PRINT REDIM _PRESERVE array(10 TO 20) FOR i = 10 TO 20 PRINT array(i); NEXT END

0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10

See also

• $STATIC, $INCLUDE
• DIM, REDIM, _DEFINE
• STATIC
• ERASE, CLEAR
• Arrays, Metacommand

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