zinger | vocabulary builder , which which helps in retaining new words

Using the [] operator will allow you to get data from dictionaries

Map and Reduce will do the trick. You first need to get the prices as an array, then add each of those values to produce your total.

See the Docs

Dispatching on values isn't magic. It uses the exact same mechanics as for dispatching on parametric types. So you need to pass in a instance parametric type which has that value as a type parameter if you want to dispatch on it.

In your question Val is the parametric type -- and it exists just for this kind of thing.

So you need to have written:

You can do the following:

import Dimensions from react-native, The idea here is to give the View a width of whatever percentage of the phone screen size and then give the image a percentage of the View that would give you what you want. For example, if I want to display three images in a row, I can give my View a width of 90% and flexWrap: wrap, and give each image inside it a width of 30% so it can only contain 3 images in a row.

You can do the following for your case.

How about something like this?

This implementation makes constants out of the menu item labels so they can be reused.

It also includes validation for making sure an item is on the menu and also avoids throwing an InputMismatchException if the user attempts to enter something other than a number when you scan for a number.

To fix the adding and subtracting of the price to should calculate the subTotal but only add the price to the total.

You could update your add and subtract functions to: