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Printing Output

Part of the Fundamentals section of Coddy's Dart journey — lesson 3 of 94.

Dart's print() function displays information to the console, useful for output and debugging.

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

This displays Hello, Dart! in the console. Multiple print statements output on separate lines:

void main() {
  print('First line');
  print('Second line');
  print('Third line');
}

Result:

First line
Second line
Third line

Challenge

Beginner

Use the code view to write a program that outputs Hello World!

Note that anything inside quotation marks is case sensitive. For example:
print('Hello World!');
print("hello world!");
are different things (notice the capital letters in the first line).

Cheat sheet

Dart's print() function displays information to the console:

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

Multiple print statements output on separate lines:

void main() {
  print('First line');
  print('Second line');
  print('Third line');
}

Text inside quotation marks is case sensitive.

Try it yourself

void main() {
    // Print 'Hello World!'
}

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

What is Dart?The main FunctionPrinting OutputCode Comments

4Operators Part 2

Comparison Operators Logical AND Logical OR Logical NOT Type Test Operators Recap - Making Comparisons

7Working with Strings

String Concatenation String Interpolation Multi-line Strings String Properties Basic String Methods

10Collections - Maps Basics

What are Maps?Creating a Map Accessing Values by Key Key-Value Pairs Getting Map Size Getting Keys Getting Values Checking if a Key Exists

13Null Safety In Depth

Understanding Null Nullable Types Non-Nullable Types Null Assertion Operator Late Initialization Recap - Handling Null Safely

16Fundamentals Challenges

Challenge: List of calculation Challenge: Sum of numbers Challenge: Find product

3Operators Part 1

Arithmetic Operators Integer Division Modulo Operator Increment and Decrement Assignment Shortcuts Recap - Simple Calculations

6Control Flow - Decision Making

The 'if' Statement The 'else' Statement The 'else if' Statement Recap - Simple Decisions Nested 'if' Statements The 'switch' Statement

9Collections - Lists Basics

What are Lists?Creating a List Accessing by Index Getting List Length Adding Elements Removing Elements Checking if a List is Empty Iterating Over a List

12Functions Advanced

Optional Positional Parameters Named Parameters Required Named Parameters Default Parameter Values Recap - Function Parameters

15Project: Simple Calculator

Setting Up Declaring Number

Project lesson

Creating an Operation

Project lesson

Performing Calculation

Project lesson

Displaying Result

Project lesson