How can async/await be used to execute requests sequentially with the ability to terminate the process after the third request without waiting for the fourth?

To perform sequential requests using async/await and be able to cancel the process after the third request, you can use a simple loop with a result check or a counter. For example, in Swift:

func performRequests() async {
    for i in 1...4 {
        let result = await makeRequest(number: i)
        print("Request \(i) completed with result: \(result)")
        if i == 3 {
            print("Stopping the process after the third request")
            break
        }
    }
}

func makeRequest(number: Int) async -> String {
    // Simulate an asynchronous request
    try? await Task.sleep(nanoseconds: 1_000_000_000) // 1 second
    return "Response \(number)"
}

In this example, requests are executed sequentially because we use await inside the loop. After the third request, the loop is interrupted by the break statement, and the fourth request is not executed.

Thus, async/await allows writing asynchronous code that looks like synchronous code and makes it easy to control the execution logic.