prefer_int_literals  
            
            Prefer int literals over double literals.
This rule is available as of Dart 2.1.0.
This rule has a quick fix available.
Details
DO use int literals rather than the corresponding double literal.
BAD:
const double myDouble = 8.0;
final anotherDouble = myDouble + 7.0e2;
main() {
  someMethod(6.0);
}
GOOD:
const double myDouble = 8;
final anotherDouble = myDouble + 700;
main() {
  someMethod(6);
}
Usage
To enable the prefer_int_literals rule,
add prefer_int_literals under linter > rules in your
analysis_options.yaml
file:
linter:
  rules:
    - prefer_int_literals