Return an explicit missing result
Difficulty: Easy
Return numerator / denominator for finite inputs, or null when denominator is zero.
Examples
6, 231, 0None0, 40Constraints
Use strict TypeScript and a standalone function. No imports, packages, DOM, network, or file access. Inputs are JSON-compatible with at most 1,000 elements and 100,000 characters. Do not mutate inputs. Return the specified result rather than printing. Medium tasks combine narrowing and typed transformations.
Review lesson: Function signatures and missing resultsA little nudge
Reveal one hint at a time. Give yourself a moment to try it.
Worked solution
Try your own approach first, then compare the reasoning.
Complexity
Ready when you are
Write your solution, then run it against the practice tests.
Press Esc, then Tab to leave the editor. Code runs in an isolated browser workspace. Tests support learning, not verified grading.