for, for...in, for...of 비교

 

console.clear();

const animals = ['cat', 'dog','sheep', 'hippo', 'tiger', 'pig'];

console.log('----------for');

for(let i = 0; i<animals.length;i++) {

    console.log(animals[i]);

}

//인덱스가 출력됨

console.log('----------for in');

for(let i in animals) {

    console.log(i);

}

// value가 출력됨

console.log('----------for of');

for(let i of animals) {

    console.log(i);

}