(darganApps Update 4) Creating Activities and using different variables

An android app consists of several activities. Activities are screens that the user sees when interacting with the app. I have seen how to start activities from other activities by using the “intent” method and defining the activities in the Android manifest file. I will have to create a few variables as well as screens for my app. Now I am learning how to take input from the user and use it as a variable.