Зміст курсу

Introduction to Dart

1. First Acquaintance with Dart

About Dart First Application Function print()Comments Basic Math Operations

2. Variables and Data Types

Data Types Variables Properties of Numbers Bool, Equality and Relational Operators

3. Conditional Statements

if Statement if...else Statement else-if Statement switch-sase Statement

4. List and String

List Indexes String What are Methods?String Properties and Methods

5. Loops

Introduction to Loops while-Loops Do-while for-Loops Increment and Decrement Break and Continue

Introduction to Dart

switch-sase Statement

When we have many conditions to check, using multiple if-else statements may not be convenient.

Example

main.dart

The code looks confusing, but we can make it more readable. For such cases, we can use the switch-case statement.

Switch-case Statement

The switch-case statement consists of several parts:

main.dart

A switch-case statement is a construct that allows you to execute a block of code based on the value of a variable. The variable is called the switch variable. The switch variable is evaluated once, and the corresponding block of code is executed.

main.dart

In this example, the switch variable is dayOfWeek. The switch variable is evaluated once, and the corresponding code block is executed;
If one of the conditions is met, then after executing its code block, the subsequent conditions will not be checked, and the code blocks of those conditions will not be executed either;
In this case, the code block for dayOfWeek is "Friday". If the value of dayOfWeek does not match any of the cases, the default code block is executed. In this case, the default code block is "Weekend".

Все було зрозуміло?

Секція 3. Розділ 4

Зміст курсу

Introduction to Dart

1. First Acquaintance with Dart

About Dart First Application Function print()Comments Basic Math Operations

2. Variables and Data Types

Data Types Variables Properties of Numbers Bool, Equality and Relational Operators

3. Conditional Statements

if Statement if...else Statement else-if Statement switch-sase Statement

4. List and String

List Indexes String What are Methods?String Properties and Methods

5. Loops

Introduction to Loops while-Loops Do-while for-Loops Increment and Decrement Break and Continue

Introduction to Dart

switch-sase Statement

When we have many conditions to check, using multiple if-else statements may not be convenient.

Example

main.dart

The code looks confusing, but we can make it more readable. For such cases, we can use the switch-case statement.

Switch-case Statement

The switch-case statement consists of several parts:

main.dart

In this example, the switch variable is dayOfWeek. The switch variable is evaluated once, and the corresponding code block is executed;
If one of the conditions is met, then after executing its code block, the subsequent conditions will not be checked, and the code blocks of those conditions will not be executed either;
In this case, the code block for dayOfWeek is "Friday". If the value of dayOfWeek does not match any of the cases, the default code block is executed. In this case, the default code block is "Weekend".

Все було зрозуміло?

Секція 3. Розділ 4