Does ReDim erase array VBA?

Clear Dynamic Array When you use ReDim it removes all the elements. But you can use the preserve statement to preserve some of the elements and clear an array partially.

What does ReDim preserve mean in VBA?

Redim Preserve allows you to change the dimensions of an array while keeping the contents of the array. The Redim Preserve at the end of each loop is adding another row to the array.

How does ReDim preserve work?

Preserving Values ReDim will re-initialize the array and destroy any data in it unless you use the Preserve keyword. Preserve copies the elements from the old array to the new array. It is possible to resize an array without losing the existing values by using the Preserve keyword.

What is the use of ReDim and preserve?

Preserve is an optional keyword used to preserve the data in an existing array when you change the size of the last dimension. The ReDim statement is used to resize an array that has already been explicitly declared using the Dim, Private, or Public statement.

How do I ReDim preserve a two dimensional array?

ReDim Preserve any dimension of a 2D Array If you’d like to ReDim Preserve a multidimensional array larger than two-dimensions, your best bet is to construct your array in such a way that only the number of elements in the last dimension will need to be preserved.

How does ReDim work VBA?

The ReDim statement is used to size or resize a dynamic array that has already been formally declared by using a Private, Public, or Dim statement with empty parentheses (without dimension subscripts). Use the ReDim statement repeatedly to change the number of elements and dimensions in an array.

Why do we use ReDim?

You can use the ReDim statement to change the size of one or more dimensions of an array that has already been declared. If you have a large array and you no longer need some of its elements, ReDim can free up memory by reducing the array size. On the other hand, if your array needs more elements, ReDim can add them.