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Introduction to Dart
course content

Contenu du cours

Introduction to Dart

Introduction to Dart

1. First Acquaintance with Dart
Dart OverviewYour First Dart ApplicationFunction print() in DartDart CommentsBasic Math Operations
2. Variables and Data Types in Dart
Data Types in DartVariables in DartProperties of Numbers in DartString in DartBool, Equality and Relational Operators in DartList in DartIndexes in Dart
3. Conditional Statements
if Statement in Dartif...else Statement in Dartelse-if Statement in Dartswitch-case Statement in Dart
4. Loops in Dart
Introduction to Loopswhile Loop in Dartdo while Loop in DartFor-Loop in DartIncrement and Decrementbreak and continue

book
List in Dart

Lists can be useful for:

  • Storing data about a list of things, such as a shopping list, a to-do list, or a contact list;

  • Storing data about a sequence of events, such as a history list or a list of steps that need to be taken to complete a task.

Syntax

Let's look at the scheme of creating a List:

dart

  • List: command to create a list;

  • <elements_type>: the data type for values will be stored in the middle of the list;

  • list_name: list name;

  • [element_1, element_2]: commas (,) separate the list elements.

Example

Example of creating a List with int values:

dart

main

copy

              
1

            
List<int> numbers = [1, 2, 3, 4, 5];

  • List of integer numbers;

  • <int> type elements from List.

Adding Items

Let's add a value to the already existing list of numbers.

dart

main

copy

              
123456

            
void main() {
  List<int> numbers = [111, 22, 32];
  print(numbers); // Output [111, 22, 32]
  numbers.add(6); // Adding an item to a list
  print(numbers); // Output [111, 22, 32, 6]
}

dart

Let's break down the new command in detail:

  • numbers: list name;

  • add(): command that adds elements to a list;

  • 6: the value we want to add to the list.

Deleting Items

dart

Let's break down the new command in detail:

  • numbers: list name;

  • remove(): command that removes the first occurrence of the specified item in the list;

  • element: the value we want to add to the list.

dart

main

copy

              
123456

            
void main() {
  List<int> numbers = [11, 22, 23];
  print(numbers); // [11, 22, 23]
  numbers.remove(22);
  print(numbers); // [11, 23]
}

We removed 22 from the List

We heva a List:

dart
question-icon

Remove the value true from the List items

.;

Click or drag`n`drop items and fill in the blanks

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 2. Chapitre 6

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course content

Contenu du cours

Introduction to Dart

Introduction to Dart

1. First Acquaintance with Dart
Dart OverviewYour First Dart ApplicationFunction print() in DartDart CommentsBasic Math Operations
2. Variables and Data Types in Dart
Data Types in DartVariables in DartProperties of Numbers in DartString in DartBool, Equality and Relational Operators in DartList in DartIndexes in Dart
3. Conditional Statements
if Statement in Dartif...else Statement in Dartelse-if Statement in Dartswitch-case Statement in Dart
4. Loops in Dart
Introduction to Loopswhile Loop in Dartdo while Loop in DartFor-Loop in DartIncrement and Decrementbreak and continue

book
List in Dart

Lists can be useful for:

  • Storing data about a list of things, such as a shopping list, a to-do list, or a contact list;

  • Storing data about a sequence of events, such as a history list or a list of steps that need to be taken to complete a task.

Syntax

Let's look at the scheme of creating a List:

dart

  • List: command to create a list;

  • <elements_type>: the data type for values will be stored in the middle of the list;

  • list_name: list name;

  • [element_1, element_2]: commas (,) separate the list elements.

Example

Example of creating a List with int values:

dart

main

copy

              
1

            
List<int> numbers = [1, 2, 3, 4, 5];

  • List of integer numbers;

  • <int> type elements from List.

Adding Items

Let's add a value to the already existing list of numbers.

dart

main

copy

              
123456

            
void main() {
  List<int> numbers = [111, 22, 32];
  print(numbers); // Output [111, 22, 32]
  numbers.add(6); // Adding an item to a list
  print(numbers); // Output [111, 22, 32, 6]
}

dart

Let's break down the new command in detail:

  • numbers: list name;

  • add(): command that adds elements to a list;

  • 6: the value we want to add to the list.

Deleting Items

dart

Let's break down the new command in detail:

  • numbers: list name;

  • remove(): command that removes the first occurrence of the specified item in the list;

  • element: the value we want to add to the list.

dart

main

copy

              
123456

            
void main() {
  List<int> numbers = [11, 22, 23];
  print(numbers); // [11, 22, 23]
  numbers.remove(22);
  print(numbers); // [11, 23]
}

We removed 22 from the List

We heva a List:

dart
question-icon

Remove the value true from the List items

.;

Click or drag`n`drop items and fill in the blanks

Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 2. Chapitre 6
Nous sommes désolés de vous informer que quelque chose s'est mal passé. Qu'est-il arrivé ?
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