MainViewModelCompose.kt

class MainViewModel : ViewModel() {
    private val _count = MutableStateFlow(0)
    val count get() = _count.asStateFlow()

    init {
        _count.value = 0
    }

    fun increase() {
        _count.value = _count.value.inc()
    }

    fun decrease() {
        _count.value = _count.value.dec()
    }
}