js function expression & declaration

js-function-expression-declaration.js

plus(1, 2) // this won't complain, as add() is hoisted
minus(2, 1) // this will complain, as minus is defined later

// expression
function plus(x, y) {
  return x + y;
}

// declaration
const minus = function (x, y) {
  return x - y;
}