01-ticket-pricing.js

JavaScript
1/**
2 * 🎬 The Starlight Cinema
3 *
4 * You've just been hired at Starlight Cinema! Your first task is to build
5 * the automated ticket pricing system. The manager hands you a sticky note
6 * with the pricing rules scribbled on it:
7 *
8 * Age Groups:
9 *   - Children (0–12): $8
10 *   - Teens (13–17): $12
11 *   - Adults (18–59): $15
12 *   - Seniors (60+): $10
13 *
14 * Weekend Surcharge:
15 *   - Add $3 on weekends (when isWeekend is true)
16 *
17 * Rules:
18 *   - If age is negative or not a number, return -1
19 *   - isWeekend is a boolean
20 *
21 * @param {number} age - The customer's age
22 * @param {boolean} isWeekend - Whether it's a weekend
23 * @returns {number} The ticket price, or -1 for invalid input
24 */
25export function getTicketPrice(age, isWeekend) {
26
27  if (age < 0 || typeof age !== "number" ) {
28    return -1;
29  }
30
31  let price;
32
33  if (age <= 12) {
34    price = 8;
35  } else if (age <= 17) {
36    price = 12;
37  } else if (age <= 59) {
38    price = 15;
39  } else {
40    price = 10;
41  }
42
43  if (isWeekend === true) {
44    price += 3;
45  }
46
47  return price;
48}
49
50