[Promises 1/3] What is a promise? When to use it? How to construct one?

let a = 32; a = a + 8; console.log(a); // 40 The above code is pretty straightforward. You have a variable 'a' set to a number value 32. You intend to add 8 to it. And you want to see the value stored in the variable. It is never going to fail you....