Callback Functions

const isEven = (n) => {
  return n % 2 == 0;
}
let printMsg = (evenFunc, num) => {
  const isNumEven = evenFunc(num);
  console.log(`${num} is an even number: ${isNumEven}.`)
}
// Pass in isEven as the callback function
printMsg(isEven, 4); 
// => The number 4 is an even number: True.