prefer_final_in_for_each
The pattern should be final.
The variable '{0}' should be final.
Description
#The analyzer produces this diagnostic when the loop variable in a for-each statement isn't marked as being final
.
Example
#The following code produces this diagnostic because the loop variable e
isn't marked as being final
:
dart
void f(List<int> l) {
for (var e in l) {
print(e);
}
}
Common fixes
#Add the modifier final
to the loop variable, removing the var
if there is one:
dart
void f(List<int> l) {
for (final e in l) {
print(e);
}
}
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.