How to make a Calculator in Android Studio | Part 4 | Sign Changing and styling

In this video we’ll wrap up our project for the Simple Android calculator. We will add a button to change the sign of our last number and we’ll also add a history that displays the last Operation that the user performs.

You can find the code here :
https://github.com/Anass-ABEA/Android-Calculator/tree/Final_Part

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