Filter example 1

filter.js

var numbers = [1,2,3,4,5,6,7,8,9,10];

var evenNumbers = numbers.filter(function (num) {
  return num % 2 === 0;
});

// ES6
const evenNumbers = numbers.filter(num => {
  return num % 2 === 0
});

console.log(evenNumbers); // [2,4,6,8,10];