Problems › JavaScript › pricing
Discount, but never below the floor
Sales can discount freely, except that a contract sets a price the item may never go under.
- Apply the percentage, then lift the result back up to the floor if it went under.
- A floor above the list price wins — the item simply sells at the floor.
- A percentage outside 1 to 100 means no discount at all.
discountWithFloor(price: int, percent: int, floorPrice: int) → int
Where you start
function discountWithFloor(price, percent, floorPrice) {
}Worked examples
| Call | Result |
|---|---|
discountWithFloor(1000, 20, 500) | 800 |
discountWithFloor(1000, 70, 500) | 500 |
discountWithFloor(1000, 20, 1200) | 1200 |
discountWithFloor(1000, 0, 500) | 1000 |
Hint
Two steps, in order: discount, then clamp.
Reference solution in JavaScript
function discountWithFloor(price, percent, floorPrice) {
const cut = percent < 1 || percent > 100 ? price : price - Math.floor((price * percent) / 100);
return Math.max(cut, floorPrice);
}