ES2015 also introduces a new syntax for declaring functions called "fat arrow functions." Let's look at a simple variable function definition:
var greet = function(name) { console.log("Say hello to ", name);};
We could instead write that function definition with fat arrow syntax as follows:
const greet = (name) => { console.log("Say hello to ", name);};
Fat-arrow syntax also has a number of extra shortcuts you can use to make the amount of code even smaller! For example, if your function just has a single line or is just a return statement, you can rewrite your function as follows:
const greet = (name) => console.log("Say hello to ", name);
Alternatively, you can wrap your return statement in parentheses as well, like ...
