question 87 Functions · medium

Is this a valid SKU?

Runtime Market's SKUs look like HOM-22847: three capital letters for the category, a dash, then five digits. Before a SKU typed into the stock form is saved, check its format.

Functionvalid_sku(sku)

ReturnsTrue if sku is exactly 3 capital letters A–Z, -, and 5 digits 0–9; otherwise False

Rulesnothing else is allowed: no spaces, no lower-case letters, no extra characters

Examples

callvalid_sku('HOM-22847')returnsTrue

callvalid_sku('ELE-24781')returnsTrue

callvalid_sku('hom-22847')returnsFalse

callvalid_sku('HOM22847')returnsFalse