Can you take your basic "Number Doubler" calculator app and remix it to a Four Function calculator that will allow you to enter 2 numbers and then have buttons to "+", "-", "*", and "/" the 2 numbers and display the answer?
Hint: Create a app that adds 2 numbers and then the other buttons. The code for the event for each button will be the same expect the calculation for each will be different.
July 2017