What are Functions?

Part of the Fundamentals section of Coddy's Dart journey. Lesson 64 of 94.

Functions are reusable blocks of code that perform specific tasks. They help organize your code and avoid repetition.

Create a simple function that prints a greeting:

void sayHello() {
  print('Hello, Dart!');
}

void main() {
  sayHello();
}

After executing the above code, the output will be:

Hello, Dart!

Functions can be called multiple times from different places in your code:

void main() {
  sayHello();
  print('Other code...');
  sayHello();
}

void sayHello() {
  print('Hello, Dart!');
}

After executing the above code, the output will be:

Hello, Dart!
Other code...
Hello, Dart!

Try it yourself

This lesson doesn't include a code challenge.

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction to Dart

4Operators Part 2

7Working with Strings

10Collections - Maps Basics

13Null Safety In Depth

16Fundamentals Challenges

3Operators Part 1

6Control Flow - Decision Making

9Collections - Lists Basics

12Functions Advanced

15Project: Simple Calculator

Practice on your own: Online Dart compiler