loops.js

for (let i = 0; i < 5; i++) {
  console.log(i);
}

let i = 0;
do {
  console.log(i);
} while (++i < 5);

i = 0;
while (i < 5) {
  console.log(i);
  i++;
}

const car = {
  size: 3,
  wheel: 4
};

for (const prop in car) {
  console.log(prop);
  console.log(car[prop]);
}

const cars = ['a', 'b', car];

for (const index in cars) {
  console.log(index);
  console.log(cars[index]);
}

for (const value of cars) {
  console.log(value);
}