Curriculum Foundations Functions & multi-return exercise 3 · mcq
Functions & multi-return
TypeScript expresses "this can fail" by returning a union with
null/undefined, throwing, or returning a Result-like object. Go
has a strong convention: return a (value, error) tuple where
the caller checks the error against nil. Pick the idiomatic Go
signature.
TypeScript reference
About this theme
Functions look familiar — func name(args) returnType { ... } — with one big new idea: multiple return values. Go functions can return a tuple, and the convention for "this might fail" is to return (result, error). We'll meet error properly in a later module, but the *shape* arrives here.