avoid-unnecessary-digit-separators

v1.28.0

style

dart 3.6+

configurable

pro+

Suggests removing digit separators in short numbers to improve readability.

⚙️ Config

Set max-length (default is 5) to configure the maximum number of digits.

analysis_options.yaml

dart_code_metrics:
  rules:
    - avoid-unnecessary-digit-separators:
        max-length: 5

Example

❌ Bad:

void fn() {
  // LINT: Avoid adding digit separators to short numbers. Try removing them.
  final value = 1_00;

  // LINT: Avoid adding digit separators to short numbers. Try removing them.
  final another = 1_0.23;
}

✅ Good:

void fn() {
  final value = 100;
  final dbl = 10.23;
}

Additional Resources

• https://dart.dev/language/built-in-types#numbers

Related Rules

• prefer-digit-separators
• avoid-inconsistent-digit-separators