Problems › TypeScript › pricing
Loyalty points for a basket
The card scheme awards one point for every full ten lira spent, and doubles that on promotion days.
- The amount arrives in kuruş, so ten lira is 1000.
- Part of a ten does not earn anything.
- A negative amount is a refund and earns nothing.
pointsFor(spend: int, doubleDay: bool) → int
Where you start
function pointsFor(spend: number, doubleDay: boolean): number {
}Worked examples
| Call | Result |
|---|---|
pointsFor(10000, false) | 10 |
pointsFor(10999, false) | 10 |
pointsFor(10000, true) | 20 |
pointsFor(999, false) | 0 |
Hint
Integer-divide by 1000, then double if the flag is set.
Reference solution in TypeScript
function pointsFor(spend: number, doubleDay: boolean): number {
if (spend <= 0) return 0;
const base = Math.floor(spend / 1000);
return doubleDay ? base * 2 : base;
}