Where is string information usually stored in the system?

In iOS, string information is usually stored in the following places:

• UserDefaults — for small settings and user preferences. It's a simple way to save data as key-value pairs.

• File system (Documents, Caches) — for larger or structured data, such as text files.

• Core Data — if you need to save complex data models with queries and relationships.

• Keychain — for securely storing confidential strings, such as passwords.

Example of saving a string in UserDefaults:

UserDefaults.standard.set("Hello, world!", forKey: "welcomeMessage")

if let message = UserDefaults.standard.string(forKey: "welcomeMessage") {
    print(message)  // Will output: Hello, world!
}