Is it true that viewModelScope.launch{} only executes the first time?

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No, it is not true. The viewModelScope.launch{} block can be executed multiple times depending on where it is called and how it is configured. The viewModelScope.launch{} block creates a new coroutine that runs in the context of the ViewModel's lifecycle. Each time this block is called, a new coroutine is created, so it can be executed multiple times. However, it is important to ensure that coroutines launched within the viewModelScope are properly cancelled when the ViewModel is destroyed to prevent potential memory leaks.