Adding Calculator ― 10 Days of React Challenges (Beginner)

Storing data in a front-end application and reusing the stored data throughout the application or app component, is an essential piece of modern front-end applications. CodePen Final: https://codesandbox.io/s/64800qwkw3 CodePen Starter: https://codesandbox.io/s/q8nxoyqn49 In this React challenge, you'll build a simple calculator which displays the sum of two numbers.