Hoisting Example.

hoisting.js

console.log(a); // What value does 'a' have here?
var a = 5;

console.log(b); // What value does 'b' have here?
let b = 10;

function example() {
  console.log(c); // What value does 'c' have here?
  var c = 15;

  console.log(d); // What value does 'd' have here?
  let d = 20;

  if (true) {
    console.log(e); // What value does 'e' have here?
    var e = 25;

    console.log(f); // What value does 'f' have here?
    let f = 30;
  }

  console.log(e); // What value does 'e' have here?
  console.log(f); // What value does 'f' have here?
}

example();
console.log(a); // What value does 'a' have here?
console.log(b); // What value does 'b' have here?