vehicle-purchase.js

/**
 * Determines whether or not you need a licence to operate a certain kind of vehicle.
 *
 * @param {string} kind
 * @returns {boolean} whether a license is required
 */
export function needsLicense(kind) {
  return ((kind === "car") || (kind === "truck"));
}
/**
 * Helps choosing between two options by recommending the one that
 * comes first in dictionary order.
 *
 * @param {string} option1
 * @param {string} option2
 * @returns {string} a sentence of advice which option to choose
 */
export function chooseVehicle(option1, option2) {
  if (option1 > option2){
    return option2 + " is clearly the better choice.";
  } else{
    return option1 + " is clearly the better choice.";
  }
}
/**
 * Calculates an estimate for the price of a used vehicle in the dealership
 * based on the original price and the age of the vehicle.
 *
 * @param {number} originalPrice
 * @param {number} age
 * @returns {number} expected resell price in the dealership
 */
export function calculateResellPrice(originalPrice, age) {
    if (age < 3) {
      return 0.8 * originalPrice;
    } else if (age>10) {
      return 0.5 * originalPrice;
    } else {
      return 0.7 * originalPrice;
    }
}