Chapter 39 — Optional Chaining & Nullish Coalescing (Chuqur): Exercise 2 — Medium

Exercise 2 — Medium

Task:
Foydalanuvchi berilgan discount qiymati 0 bo'lishi mumkin (bu — "chegirma yo'q" degani, to'g'ri qiymat). ?? yordamida, agar discount null/undefined bo'lsagina, uni 5 (default chegirma) bilan almashtiring; 0 bo'lsa, 0 bo'lib qolsin.
Required Concepts:

• Nullish Coalescing vs ||
  Hint:
  let finalDiscount = discount ?? 5;