unnecessary_final

Local variables should not be marked as 'final'.

The analyzer produces this diagnostic when a local variable is marked as being final.

The following code produces this diagnostic because the local variable c is marked as being final:

void f(int a, int b) {
  final c = a + b;
  print(c);
}

If the variable doesn't have a type annotation, then replace the final with var:

void f(int a, int b) {
  var c = a + b;
  print(c);
}

If the variable has a type annotation, then remove the final modifier:

void f(int a, int b) {
  int c = a + b;
  print(c);
}

除非另有说明，文档之所提及适用于 Dart 3.7.3 版本，本页面最后更新时间: 2025-05-08。 查看文档源码 或者 报告页面问题。