set_forin_enumarated.swift

for (index, user) in allUsers.enumerated() {
    print("User: \(user) at index: \(index)")
    /*
     User: User(id: 654, name: "Chilly Mango") at index: 0
     User: User(id: 7, name: "Mike Biggles") at index: 1
     User: User(id: 234, name: "Midum Premium") at index: 2
     User: User(id: 99, name: "Jimmy Cho") at index: 3
     */
}