Curriculum Basics Optionals (?T) exercise 5 · fill-word
Optionals (?T)
Fill the missing single character that marks an optional type.
Same character TypeScript uses for T? suffix, but Zig writes
it as a PREFIX on the type.
TypeScript reference
Fill the blanks →
About this theme
TypeScript uses T | null (or T | undefined) to mark "maybe absent" values; Zig's analogue is the type prefix ?T. A ?T value is either some T or null. Three idiomatic ways to handle one: orelse <default> (TS ??), if (x) |unwrapped| { ... } (payload capture that runs only when present), or x.? for "I know it's not null, unwrap anyway" (panics on null). No more silent nullable bugs.