Explain what is meant by the concept of a synchronous operation or task in programming

A synchronous operation in programming is a task that is executed sequentially, and the calling code is paused until the operation completes. That is, the program waits for the result of the operation before continuing with the next code.

For example, if a function reads a file synchronously, the program execution will stop at this function until the file is fully read. This can lead to interface blocking in applications if the operation takes a long time.

Example in Swift:

func loadData() {
    let data = try? Data(contentsOf: URL(string: "https://example.com/data.json")!)
    print("Data loaded")
}
// Execution will stop here until the data is loaded
loadData()