How to choose the appropriate call to launch coroutines inside ViewModelScope?

In viewModelScope, coroutines are launched to perform asynchronous tasks related to the lifecycle of the ViewModel. The appropriate call depends on the nature of the work:

• Use launch if you do not need to return a result and want to perform a task in the background, such as data loading or UI updates.
• Use async if you need to perform a parallel task and get the result via Deferred, for example, when you need to fetch data and then process it.

Example:

viewModelScope.launch {
    val data = async { fetchDataFromNetwork() }.await()
    _uiState.value = data
}

If the task does not require a result, launch is sufficient. If a result is needed, use async with await().

Also consider the dispatcher:

• Dispatchers.IO for I/O operations,
• Dispatchers.Default for CPU-intensive tasks,
• Dispatchers.Main for UI updates.