const array = [1, 'blabla', {}, 4];
console.log(array[0]); // 1
const objects = [
{ name: '멍멍이' },
{ name: '야옹이'}
];
console.log(objects); // [Object, Object]
console.log(objects[0]); // Object {name: '멍멍이'}
objects.push({
name: '멍뭉이'
});
console.log(objects); // [Object, Object, Object]
console.log(objects[2]); // Object {name: '멍뭉이'}
console.log(objects.length); // 3