Null Aware Operators In Dart

Null-aware operators in dart use to check wether the value is null or not.

Table of Contents

Null coalescing operator

this opertor provide default value if the variable is null.

a??"a";

this operator is used for calling the particular function based on null check.

_scrollController?.dispose()

to avoid null value in a list you can use this operator.

var list = [
  ...["hello", "world"],
  ...?anotherList,
]

null check assignment operator is used assigning the default value when varibale is null, it is very similar to this ?? operator.

assign ??= "defaultValue"

Additional resources