The '''$DYNAMIC''' Metacommand allows the creation of dynamic(changeable) array sizes. {{PageSyntax}} ::REM $DYNAMIC * Qbasic [[Metacommand]]s require a REM or apostrophy (') 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 [[REDIM]]ensioned except when [[_PRESERVE]] is used in QB64 only. * [[REDIM]] [[_PRESERVE]] can preserve and may move the previous array data when the array boundaries change. * [[_PRESERVE]] allows the [[UBOUND|upper]] and [[LBOUND|lower]] boundaries of an array to be changed. The number of dimensions cannot change! * Dynamic arrays can also be resized by the program user's input if desired. * $DYNAMIC arrays MUST be [[REDIM]]ensioned if [[ERASE]] or [[CLEAR]] are used as the arrays are removed completely. ''Example:'' [[REDIM]]ing a $DYNAMIC array using [[_PRESERVE]] to retain previous array values. {{CodeStart}} '' '' {{Cl|REM}} {{Cl|$DYNAMIC}} 'create dynamic arrays only {{Cl|DIM}} array(10) 'create array with 11 elements {{Cl|FOR...NEXT|FOR}} i = 0 {{Cl|TO}} 10 array(i) = i: {{Cl|PRINT}} array(i); 'set and display element values {{Cl|NEXT}} {{Cl|PRINT}} {{Cl|REDIM}} {{Cl|_PRESERVE}} array(10 {{Cl|TO}} 20) {{Cl|FOR...NEXT|FOR}} i = 10 {{Cl|TO}} 20 {{Cl|PRINT}} array(i); {{Cl|NEXT}} {{Cl|END}} '' '' {{CodeEnd}} {{OutputStart}}0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 {{OutputEnd}} ''See also:'' * [[$STATIC]], [[$INCLUDE]] * [[DIM]], [[REDIM]], [[_DEFINE]] * [[STATIC]] * [[ERASE]], [[CLEAR]] * [[Arrays]], [[Metacommand]] {{PageNavigation}}