How to Use the Dart Compiler

To use the Dart Compiler, follow these steps:

  1. In the code editor, write your Dart code.
  2. Click the "RUN" button to compile and run your code.
  3. The output will be displayed in the console below the code editor.

Taking Inputs

In Dart, you can take inputs from the user in various ways. Here are some examples:

String Input

import 'dart:io';

void main() {
  print('Enter a string:');
  String input = stdin.readLineSync()!;
  print('You entered: $input');

Number Input

import 'dart:io';

void main() {
  print('Enter a number:');
  int num = int.parse(stdin.readLineSync()!);
  print('You entered: $num');

Importing Libraries

Dart has a rich set of built-in libraries that can be used in your programs. Here are some examples:

Using the Math Library

import 'dart:math';

void main() {
  var result = sqrt(25);
  print('Square root of 25 is $result');

Using the List Class

void main() {
  var arr = [1, 2, 3, 4, 5];
  print('Array: $arr');

Syntax 101

Dart is a client-optimized language for fast apps on any platform. Here's a primer on the major syntax basics of Dart:


Variables in Dart can be declared using var (infer type) or the data type (explicit type).

var name = 'John Doe'; // Variable assignment
int age = 25; // Variable assignment

Control Structures

Dart includes control structures such as if, else, for, while, and switch.

// If-Else
if (age > 18) {
} else {

// For loop
for (var i = 0; i < 5; i++) {


Functions in Dart are defined with the void keyword for no return value, or the data type for a return value.

void greet(String name) {
  print('Hello, $name');

greet('John Doe'); // Calls the function with 'John Doe' as the argument

Dart Online Test

A Dart online test is an effective way to assess an individual's Dart programming skills, especially in the context of web and mobile app development with Flutter. These tests typically include a mix of theoretical questions and practical coding challenges. By attempting these tests, candidates can demonstrate their understanding of Dart concepts, their problem-solving abilities, and their proficiency in writing efficient code. Dart online tests are commonly used in technical interviews, coding bootcamps, and online learning platforms to gauge a learner's understanding and proficiency in Dart.