List Collection ArrayList

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Hi!
Both list and arrays are a collection type of variables.
The main difference between them is if their size is fixed or not.
Array has a fixed size, meaning that if you create an array containing 3 elements, you can’t add more than 3 or reduce it’s size.
List has a dynamic size, meaning that if you create a list containing 3 elements, you can at all time add more elements or reduce the size of the list.

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For more info: Collection of Various Types