Create vehicle-purchase.js

includes concepts of "Conditionals" and "Comparisons".

Author: MufeezaKhan

vehicle-purchase.js

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+/**
+ * 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;
+    }
+}