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We can determine the width and height of a screen using the LocalConfiguration and Constraints API provided by Jetpack Compose.

To get the width and height, we can use the following code:

@Composable
fun ScreenSize() {
    val configuration = LocalConfiguration.current
    val screenWidthDp = configuration.screenWidthDp.dp
    val screenHeightDp = configuration.screenHeightDp.dp
    val constraints = Constraints(
        minWidth = screenWidthDp,
        maxWidth = screenWidthDp,
        minHeight = screenHeightDp,
        maxHeight = screenHeightDp
    )

    // Use the constraints to set the size of the Composable
}

In this code snippet, we first get the current LocalConfiguration, which contains information about the current screen size in density-independent pixels (dp). We then convert the screen width and height to dps and use them to create a Constraints object that limits the size of a Composable to the full size of the screen.

We can then use this constraints object to set the size of a Composable. For example, we can use it in a Box to create a Composable that fills the entire screen:

@Composable
fun FullScreenContent() {
    Box(
        modifier = Modifier.fillMaxSize(),
        contentAlignment = Alignment.Center
    ) {
        // Content that fills the entire screen
    }
}