Static variables

    Static variables (class variables) are useful for class-wide state andconstants:

    Note: This page follows the style guide recommendation of preferring lowerCamelCase for constant names.

    Static methods

    1. import 'dart:math';
    3. class Point {
    4.   num x, y;
    6.   static num distanceBetween(Point a, Point b) {
    7.     var dx = a.x - b.x;
    8.     var dy = a.y - b.y;
    9.     return sqrt(dx * dx + dy * dy);
    10.   }
    12. void main() {
    13.   var a = Point(2, 2);
    14.   var b = Point(4, 4);
    15.   var distance = Point.distanceBetween(a, b);
    16.   assert(2.8 < distance && distance < 2.9);
    17. }

    Note: Consider using top-level functions, instead of static methods, for common or widely used utilities and functionality.