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With the introduction of JavaScript ES6, new coding concepts were introduced to JavaScript and therefore to React. For instance, a JavaScript function can be expressed as lambda (arrow function). That's why a Function Component is sometimes called Arrow Function Components (or maybe also Lambda Function Component). Let's see our refactored React Component with an Arrow Function: arrowfc
Both React Arrow Function Components use a function block body now. However, the second component can be made more lightweight with a concise body for the function, because it only returns the output of the component without doing something else in between. When leaving away the curly braces, the explicit return becomes an implicit return and can be left out as well: arrowfc
When using arrow functions for React components, nothing changes for the props. They are still accessible as arguments as before. It's a React Function Component with ES6 Functions expressed as arrows instead of ES5 Functions which are the more default way of expressing functions in JS.

Note: If you run into a "React Component Arrow Function Unexpected Token" error, make sure that JavaScript ES6 is available for your React application. Normally when using create-react-app this should be given, otherwise, if you set up the project yourself, Babel is enabling ES6 and beyond features for your React application.