Dart is an open source programming language created in 2011 by Lars Bak.
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Dart is a general-purpose programming language originally developed by Google and later approved as a standard by Ecma (ECMA-408). It is used to build web, server and mobile applications, and for Internet of Things (IoT) devices. It is open-source software under a permissive free software license (modified BSD license). Read more on Wikipedia...
// Type your code here, or load an example.
int square(int num) {
return num * num;
}
int main(List<String> args) {
return square(int.fromEnvironment("input"));
}
void main() {
print('Hello, world!');
}
main() {
print('Hello World');
}
// Hello world in Dart
main() {
print('Hello world!');
}
import 'dart:math' as math;
class Point {
num x, y;
Point(this.x, this.y);
num distanceTo(Point other) {
var dx = x - other.x;
var dy = y - other.y;
return math.sqrt(dx * dx + dy * dy);
}
}
void main() {
var p = new Point(2, 3);
var q = new Point(3, 4);
print('distance from p to q = ${p.distanceTo(q)}');
}
// Import the math library to get access to the sqrt function.
import 'dart:math' as math;
// Create a class for Point.
class Point {
// Final variables cannot be changed once they are assigned.
// Create two instance variables.
final num x, y;
// A constructor, with syntactic sugar for setting instance variables.
Point(this.x, this.y);
// A named constructor with an initializer list.
Point.origin()
: x = 0,
y = 0;
// A method.
num distanceTo(Point other) {
var dx = x - other.x;
var dy = y - other.y;
return math.sqrt(dx * dx + dy * dy);
}
// Example of Operator Overloading
Point operator +(Point other) => new Point(x + other.x, y + other.y);
}
// All Dart programs start with main().
void main() {
// Instantiate point objects.
var p1 = new Point(10, 10);
var p2 = new Point.origin();
var distance = p1.distanceTo(p2);
print(distance);
}
abstract as assert async await break case catch class const continue covariant default deferred do dynamic else enum export extends external factory false final finally for get if implements import in is library new null operator part rethrow return set static super switch sync this throw true try typedef var void while with yield
Feature | Supported | Example | Token |
---|---|---|---|
Standard Library | ✓ | print('Hello, World!'); | |
Hexadecimals | ✓ | // 0[xX][0-9a-fA-F]+ | |
Conditionals | ✓ | ||
Async Await | ✓ | ||
Inheritance | ✓ | ||
Switch Statements | ✓ | ||
Exceptions | ✓ | ||
Constants | ✓ | ||
Classes | ✓ | ||
While Loops | ✓ | ||
Booleans | ✓ | true false | |
Strings | ✓ | 'Hello world' | ' |
Regular Expression Syntax Sugar | ✓ | ||
Print() Debugging | ✓ | ||
Line Comments | ✓ | // A comment | // |
Operator Overloading | ✓ | ||
File Imports | ✓ | import 'file-system.dart'; import 'dart:math' as math; | |
MultiLine Comments | ✓ | /* A comment */ | /* */ |
Comments | ✓ | // Hi /* Assume address is not null. */ | |
Case Insensitive Identifiers | X | ||
Semantic Indentation | X |