Summary - Dart basics

Combine main, print and comments to write your first Dart program.

Summary - Dart basics

In this group you learned the building blocks of Dart: the main entry point, output with print, comments with // and /* */, and string interpolation with $.

Combining these four concepts, you can write a real program. Now we will practice with two small tasks that use the group's concepts.

As you add variables, types and functions later, this is the skeleton your programs will grow on.

Exercise Greet a user

Declare a user variable (set to Zoe). Add a // comment line above describing the program's purpose. Then print Welcome Zoe using interpolation.

Show example solution

void main() {
  // Program that greets a user
  var user = 'Zoe';
  print('Welcome $user');
}

Exercise Mini program

Write a program with: a // comment, void main, and inside it a variable called topic (set to Dart). Use print to output Topic: Dart (with interpolation).

Show example solution

void main() {
  // This is a mini program
  var topic = 'Dart';
  print('Topic: $topic');
}

Test yourself

What is the return type of the main function?
```
void main() { ... }
```
- void
- int
- String
- bool
Show answer

void — main returns no value; that is why it is void.

City string

var city = 'Istanbul'; print('I live in ____city');

Show answer

var city = 'Istanbul'; print('I live in $city');

Match all concepts

void main

Entry point
// Comment

Single-line note
$name

Variable embedding
print

Produces output

Next lesson: var and type

We Are Enhancing Your Experience

Cookie Preferences

Strictly Necessary Cookies

Analytical Cookies