• for

const fruits = ['apple', 'banana'];
for(let i = 0; i<fruits.length; i++) {
    console.log(fruits[i]);
}
// apple
// banana

• for of

const fruits = ['apple', 'banana'];
for(const value of fruits) {
    console.log(value);
}
// apple
// banana

• forEach (callBack 함수)

const fruits = ['apple', 'banana'];

// 방법-1
fruits.forEach(function (name, index, array) {
    console.log(fruitname, index, array);
});
// apple 0 (2) ["apple", "banana"]
// banana 1 (2) ["apple", "banana"]

// 방법-2 (name만 출력)
fruits.forEach(function (fruitname) {
    console.log(fruitname);
});
// apple
// banana

// 방법-3 (Arrow 함수 이용)
fruits.forEach((fruitname) => {
    console.log(fruitname);
});
// apple
// banana

// 방법-4 (방법-3 간략히)
fruits.forEach((fruitname) => console.log(fruitname));