Declaring a vector in Javascript

gistfile1.txt

let valores = [5];

valores = [0, 1, 2, 3, 4]

console.log('valores');
for (let index = 0; index < valores.length; index++) {
    const element = valores[index];
    console.log(element);
}

let cores = Array(5);

cores = [0, 1, 2, 3, 4]
console.log('cores');
for (let index = 0; index < cores.length; index++) {
    const element = cores[index];
    console.log(element);
}