Null safety
Dart separates nullable and non-null types, so absence is explicit.
What you will be able to do
- Add ? for nullable types.
- Use ?. and ?? safely.
- Avoid ! unless proven.
In plain English
Dart separates nullable and non-null types, so absence is explicit.
- Add ? for nullable types.
- Use ?. and ?? safely.
- Avoid ! unless proven.
String? name = null;
final safe = name ?? 'friend';
print('Hello, $safe');Your turn
EasyExplain it back
Answer from memory: What does ?? do?
TEXT · starter
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Knowledge checkQuestion 1
What does ?? do?
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