es6-arrow-functions

Question 1

What is the syntax for defining an arrow function?

Answer 1

(param1, paramN) => {
   let a = 1;
   return a + param1 + paramN;
}

Question 2

When an arrow function’s body is left without curly braces, what changes in its functionality?

Answer 2

It expects an expression (and not a statement)

It’s going to return a value (if we use curly braces we must add a return)

Question 3

How is the value of this determined within an arrow function?

Answer 3

By its surrounding scope.

they execute in the scope they are created (the arrow function definition)