Is it possible to use different data types inside a single array?

In iOS, speaking about the Swift language, arrays (Array) are type-safe and contain elements of a single type. You cannot directly create an array with elements of different types, for example, [Int, String, Double].

However, if you need to store different types in one array, you can use the Any or AnyObject type:

let mixedArray: [Any] = [42, "text", 3.14, true]

In this case, the array contains elements of different types, but when working with them, you need to cast the types back, which reduces safety and convenience.

In Objective-C, arrays (NSArray) can contain objects of different classes, as they are collections of objects, but primitive types need to be wrapped in objects (NSNumber, NSString, etc.).

Thus, in Swift, arrays are strictly typed, but with Any, you can store different types, although it is not recommended unless necessary.