How is access to elements within a data structure performed?

In iOS, access to elements within a data structure depends on the type of the structure.

• For arrays (Array), access is by index, for example array[0].
• For dictionaries (Dictionary), access is by key, for example dict["key"].
• For sets (Set), there is no direct access by index, but you can iterate or check for the presence of an element.

Example:

let array = ["apple", "banana", "cherry"]
print(array[1])  // banana

let dict = ["name": "John", "age": "30"]
if let name = dict["name"] {
    print(name)  // John
}

let set: Set = [1, 2, 3]
if set.contains(2) {
    print("Set contains 2")
}
``