prefer_final_locals
Local variables should be final.
Description
#The analyzer produces this diagnostic when a local variable isn't marked as being final
.
Example
#The following code produces this diagnostic because the variable s
isn't marked as being final
:
dart
int f(int i) {
var s = i + 1;
return s;
}
Common fixes
#Add the modifier final
to the variable, removing the var
if there is one:
dart
int f(int i) {
final s = i + 1;
return s;
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.