Array Dictionary
Dynamic array is possible
There is no concept of dynamic dictionary
Size of array must be set before the use of array
The size of dictionary do not need to be set
We have to use redim statement before adding extra element into dynamic array
To add extra element there is no need to write any statement. We just use add method
There is no particular method to release the memory if particular element is not required
Element which is not required any longer can be removed from the dictionary
