for

for(let i =0; i < 10; i++) {
	console.log(i);
}

for (let i = 10; i > 0; i--) {
  console.log(i);
}

배열과 for

const names = ['멍멍이' , '야옹이' , '멍뭉이'];

for ( let i =0; i < names.length; i++) {
	console.log(names[i]);
}

for of

for ( const i of [1 , 2 , 3] ) {
	console.log(i); // 1 , 2 , 3
}

while

let i=0;

while ( i < 10 ) {
	console.log(i);
  	i++;
}

객체를 위한 반복문 for...in

const doggy = {
  name : '멍멍이', 
  sound : '멍멍' ,
  age : 2
};

console.log(Object.entries(doggy));
console.log(Object.keys(doggy));
console.log(Object.values(doggy));

const doggy = {
  name: '멍멍이',
  sound: '멍멍',
  age: 2
};

for (let key in doggy) {
  console.log(`${key}: ${doggy[key]}`);
}