Introduction to Dart

Introduction to Dart

0%

1. First Acquaintance with Dart

This section will tell you about the advantages of Dart and why you should learn it. We'll also write the first programs on Dart

First Application

Function print()

Basic Math Operations

2. Variables and Data Types

Numbers and text are an integral part of every application and mobile application. This section will teach you how to work with these and other data types.

Data Types

Properties of Numbers

Bool, Equality and Relational Operators

3. Conditional Statements

Previously, our code only worked linearly from top to bottom. In this section, we will learn how to control the code flow.

if...else Statement

else-if Statement

switch-sase Statement

4. List and String

Every serious program has a lot of data. Data is usually stored in sets. In this section, we will explore data collections.

What are Methods?

String Properties and Methods

5. Loops

In programs, instructions often need to be repeated many times. To do it quickly, we can use loops. In this section, we will study cycles.

Introduction to Loops

Increment and Decrement

Break and Continue

Conteúdo do Curso

Introduction to Dart

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

Data Types

What are Data Types?

Dart supports different data types for different tasks. Like in life, we use words to communicate and numbers to calculate.

Dart allows us to use numbers for mathematical operations:

main


              123
            
void main() {
  print(22+33);
}

In Dart, we can join strings:

main


              123
            
void main() {
  print("Name " + "Alex");
}

We can use the bool data type to print whether a statement is true or false:

main


              1234
            
void main() {
  // 2 > 1 ?
  print(true);
}

In the future, we will learn to work with all types of data, and in the following chapters we will consider the simplest of them.

What are the Differences Between Data Types?

For example, we can perform mathematical operations between int and double because both are numbers.

Note

int and double are numbers, but the int data type does not store decimals, so it can only store integers. But the double can store any number.

However, we cannot add a String to an int or double because a String is simply a sequence of characters, which does not support mathematical operations.

main


              123
            
void main() {
  print("String example " + 44);
}

Tudo estava claro?

Obrigado pelo seu feedback!

Seção 2. Capítulo 1

some-alt