Dart Academy · Lesson

Null-Aware Operators: ?., ??, and !

Read and default null values safely.

Working With Maybe-Null

Nullable values need gentle handling. Dart's null-aware operators let you read and default them in one short step. ✨

Use ?. to call a member only when the object is not null. If it is null, the whole expression becomes null.

String? name;
int? len = name?.length;