# Naming Conventions ## Naming conventions **UpperCamelCase**: For Classes, Enumerations, and Typedefs.
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class HomeLayout {}class homeLayout {}

enum IntegrationEnv {

dev,

pro,

}

enum integration_env {

dev,

pro,

}

typedef NaviAction = void Function();typedef naviaction = void Function();
**snake\_case:** Libraries, packages, directories, and file names.
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library appflowy_calendar;library AppFlowy_Calendar;
import 'package:protobuf/protobuf.dart';import 'package:protobuf/Protobuf.Dart';
appflowy_calendar_block.dartAppflowyCalendar_block.dart
**lowerCamelCase:** Variables, constants, and parameters.
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let mut item;let mut Item;
const testValue = 14.28;const test_value = 14.28;
final urlScheme = RegExp(‘^([a-z]+):’);final Url_Scheme = RegExp(‘^([a-z]+):’);
void sum(int testValue) { ... }void sum_of(int test_value) { ... }