Null

An explicitly assigned absence, distinct from unassigned.

Declaration

Choose the type in a Variable/parameter/field type picker. Use the nullable flag only when absence is part of the intended model.

Example

Null item

Requires a nullable destination. Explicit Null does not select an optional default and consumes a Final binding’s first assignment.

Compatibility

Required inputs must be assigned and type-compatible. Nullable values require compatible nullable inputs or coalescing. Collection declarations remain invariant; native Targets and custom classes follow their supported inheritance rules. Final controls a binding, not deep immutability.

Variables · Arguments · Collections · Classes · Expressions