Can I make a back button in app lab?

1

My students are successfully using setScreen to move from one screen to another. However, they want to use a back button to return to whichever screen the user just came from. Does anyone know how to do this?

Thanks!

2

so… this may be more complicated depending on how many screens your students may have but storing the screen name in a variable should do the trick

var currentScreen = "screen1"
var previousScreen = "";
function changeScreen(id) {
previousScreen = currentScreen;
setScreen(id);
currentScreen = id;
}

though if your students are looking for something further back like tracing paths you took through multiple screens you’ll need to do a big lesson for that and I’m not even sure if you should. this should just help get there feet wet to get a feel for it either that or setting back buttons on each screen of which you’ll pretty much need anyways using setScreen(id)will allow screen navigation in your program