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import Foundation actor BankAccount { var balance = 0 func deposit(_ amount: Int) -> Int { balance += amount Thread.sleep(forTimeInterval: 1.0) return balance } func getInterest(with rate: Double) -> Int { let interest = Int(Double(balance) * rate) let balance = deposit(interest) return balance } } func bankAccountMain() { let bankAccount = BankAccount() Task.detached { print(Thread.current) print(await bankAccount.deposit(100)) print(await bankAccount.getInterest(with: 0.5)) } Task { print(Thread.current) print(await bankAccount.deposit(100)) print(await bankAccount.getInterest(with: 0.5)) } }