The calculator is the app that is present on every android device. This app comes pre-installed or we can also install another application from Play Store. 

It is one of the most used applications for college students for making any calculations. In this article, we will take a look at building a simple scientific calculator app in Android using Kotlin. 

Step 1: Create a New Project

Step 2: Adding new colors to the colors.xml file

Navigate to the app > res > values > colors.xml file and add the below code to it for different colors. Comments are added in the code to get to know in more detail. 

Related Article : https://www.geeksforgeeks.org/how-to-make-a-scientific-calculator-android-app-using-android-studio/