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
:
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:
int f(int i) {
final s = i + 1;
return s;
}
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.