use_is_even_rather_than_modulo

Prefer intValue.isOdd/isEven instead of checking the result of % 2.

PREFER the use of intValue.isOdd/isEven to check for evenness.

BAD:

bool isEven = 1 % 2 == 0;
bool isOdd = 13 % 2 == 1;

GOOD:

bool isEven = 1.isEven;
bool isOdd = 13.isOdd;

To enable the use_is_even_rather_than_modulo rule, add use_is_even_rather_than_modulo under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - use_is_even_rather_than_modulo

If you're instead using the YAML map syntax to configure linter rules, add use_is_even_rather_than_modulo: true under linter > rules:

linter:
  rules:
    use_is_even_rather_than_modulo: true

Unless stated otherwise, the documentation on this site reflects Dart 3.6.2. Page last updated on 2025-01-27. View source or report an issue.