'use strict'; const letters = []; letters.push('B'); console.dir({ letters }); letters.unshift('A'); console.dir({ letters }); letters.push('C'); console.dir({ letters }); const numbers = [1, 2, 3]; numbers.push(4); console.dir({ numbers }); const languages = ['C++', 'JavaScript', 'Python', 'Haskell', 'Swift']; console.dir({ length: languages.length, 'languages[0]': languages[0], 'languages[languages.length - 1]': languages[languages.length - 1], });