control_flows.js

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

if (car.size >= 10) {
  console.log('This car is large.');
} else if (car.wheel !== 4) {
  console.log('This car is broken.');
} else {
  console.log('This car is boring.');
}

const FUEL_TYPES = {
  PETROL: 'petrol',
  DIESEL: 'diesel',
  HYBIRD: 'hybird',
  ELECTRIC: 'electric'
};

switch (car.type) {
  case FUEL_TYPES.PETROL:
    console.log("It's a petrol car.");
    break;
  case FUEL_TYPES.DIESEL:
    console.log("It's a diesel car.");
    break;
  case FUEL_TYPES.HYBIRD:
    console.log("It's a hybird car.");
    break;
  case FUEL_TYPES.ELECTRIC:
    console.log("It's a electric car.");
    break;
  default:
    console.log('The fuel type of the car is unknown.');
}

switch (car.type) {
  case FUEL_TYPES.PETROL:
  case FUEL_TYPES.DIESEL:
  case FUEL_TYPES.HYBIRD:
  case FUEL_TYPES.ELECTRIC:
    console.log(`It's a ${car.type} car.`);
    break;
  default:
    console.log('The fuel type of the car is unknown.');
}