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Introduction to Dart

bookDart Comments

Developers often need a tool to make their code easier to understand. It's often helpful for himself and the people he works with on code. A comment is a text that the Dart interpreter ignores, allowing us to explain parts of the code. There are several main uses for comments.

An explanation of what the code does:

main.dart

main.dart

copy

              
123

            
void main() {
  print('Correct'); // Output word "Correct" to console
}

We often comment out code blocks to avoid errors at runtime:

main.dart

main.dart

copy

              
12345

            
void main() {
  print('Hello, World!');
  //; print Hello, World!"'()
  print("Hello, World!");
}

Code Syntax

Dart supports single-line comments // and multi-line comments /* */.

Single-line comment:

main.dart

main.dart

copy

              
123

            
void main() {
  print('info'); // Output 'info' to console  
}

Multi-line comment:

main.dart

main.dart

copy

              
12345

            
void main() {
  /* Multi-line 
    comment */
  print("Very useful topic");
}
question mark

How many times will the word Dart be displayed in the console?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 1. Kapitel 4

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bookDart Comments

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Developers often need a tool to make their code easier to understand. It's often helpful for himself and the people he works with on code. A comment is a text that the Dart interpreter ignores, allowing us to explain parts of the code. There are several main uses for comments.

An explanation of what the code does:

main.dart

main.dart

copy

              
123

            
void main() {
  print('Correct'); // Output word "Correct" to console
}

We often comment out code blocks to avoid errors at runtime:

main.dart

main.dart

copy

              
12345

            
void main() {
  print('Hello, World!');
  //; print Hello, World!"'()
  print("Hello, World!");
}

Code Syntax

Dart supports single-line comments // and multi-line comments /* */.

Single-line comment:

main.dart

main.dart

copy

              
123

            
void main() {
  print('info'); // Output 'info' to console  
}

Multi-line comment:

main.dart

main.dart

copy

              
12345

            
void main() {
  /* Multi-line 
    comment */
  print("Very useful topic");
}
question mark

How many times will the word Dart be displayed in the console?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 1. Kapitel 4
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