Это должно решить вашу проблему.
const cities = ["Phoenix", "Austin", "San Diego", "New York"];
const states = ["Arizona", "Texas", "California", "New York"];
for (let i = 0; i < cities.length; i++) {
console.log(cities[i] + "is in " + states[i])
}
Вы также можете объединить два массива в один.
const cities = ["Phoenix", "Austin", "San Diego", "New York"];
const states = ["Arizona", "Texas", "California", "New York"];
const zip = cities.map((city, index) => [city, states[index]]);
for (let i = 0; i < cities.length; i++) {
console.log(zip[i][0] + "is in " + zip[i][1])
}