Course Content

C++ Data Types

1. Introduction

Overview Arithmetic Operations Division int and double Math in C++Specifying a Type

2. Numerical Data Types

Integers Using Integers Type modifier Float Double Numerical Data Types Summary

3. Text Data Type

Char String Working with String Elements String Methods Changing The String Practice Finding Text in a String

4. Other Data Types and Concepts

Boolean Boolean Expressions Void Auto Unsigned Implicit Type Conversion Explicit Type Conversion

String

Instead of working with individual characters, we usually work with complete words, sentences, or texts sequences of characters. One way to represent these sequences is with a char array, like this:

main


              12345678910
            
#include <iostream>

int main()
{
    // The '\0' is a null terminator, used to indicate the end of the string
    // It ensures that the array of characters is treated as a proper string
    char word[6] = { 'H', 'e', 'l', 'l', 'o', '\0' };  
    std::cout << word << std::endl;
}

As you can see, initializing a character array can be tricky. Moreover, modifying the text, such as adding more characters, requires redefining the array with additional memory.

Thankfully, you can use the string class, which simplifies this process significantly.

string


              1
            
std::string text = "Any text in double quotes";

So you can assign to a string any text within double quotes " ". Also, adding more text to a string is as easy as using the .append() method. Here is an example:

main


              123456789101112
            
#include <iostream>

int main()
{
    // Declare and initialize a string
    std::string word = "Codefinity";
    std::cout << word << std::endl;
    
    // Use the append() method to add ".com" to the string.
    word.append(".com");  
    std::cout << word << std::endl;
}

Besides .append(), there are many other methods of a string to allow you efficiently operate with text data. Here is the table with some. They will be discussed in more detail in later chapters.

Task

Swipe to show code editor

Create a string variable and store the name 'Alex' in it.
Output its value to the console.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 3. Chapter 2

String

main


              12345678910
            
#include <iostream>

int main()
{
    // The '\0' is a null terminator, used to indicate the end of the string
    // It ensures that the array of characters is treated as a proper string
    char word[6] = { 'H', 'e', 'l', 'l', 'o', '\0' };  
    std::cout << word << std::endl;
}

As you can see, initializing a character array can be tricky. Moreover, modifying the text, such as adding more characters, requires redefining the array with additional memory.

Thankfully, you can use the string class, which simplifies this process significantly.

string


              1
            
std::string text = "Any text in double quotes";

So you can assign to a string any text within double quotes " ". Also, adding more text to a string is as easy as using the .append() method. Here is an example:

main


              123456789101112
            
#include <iostream>

int main()
{
    // Declare and initialize a string
    std::string word = "Codefinity";
    std::cout << word << std::endl;
    
    // Use the append() method to add ".com" to the string.
    word.append(".com");  
    std::cout << word << std::endl;
}

Besides .append(), there are many other methods of a string to allow you efficiently operate with text data. Here is the table with some. They will be discussed in more detail in later chapters.

Task

Swipe to show code editor

Create a string variable and store the name 'Alex' in it.
Output its value to the console.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 3. Chapter 2

String

main


              12345678910
            
#include <iostream>

int main()
{
    // The '\0' is a null terminator, used to indicate the end of the string
    // It ensures that the array of characters is treated as a proper string
    char word[6] = { 'H', 'e', 'l', 'l', 'o', '\0' };  
    std::cout << word << std::endl;
}

As you can see, initializing a character array can be tricky. Moreover, modifying the text, such as adding more characters, requires redefining the array with additional memory.

Thankfully, you can use the string class, which simplifies this process significantly.

string


              1
            
std::string text = "Any text in double quotes";

So you can assign to a string any text within double quotes " ". Also, adding more text to a string is as easy as using the .append() method. Here is an example:

main


              123456789101112
            
#include <iostream>

int main()
{
    // Declare and initialize a string
    std::string word = "Codefinity";
    std::cout << word << std::endl;
    
    // Use the append() method to add ".com" to the string.
    word.append(".com");  
    std::cout << word << std::endl;
}

Besides .append(), there are many other methods of a string to allow you efficiently operate with text data. Here is the table with some. They will be discussed in more detail in later chapters.

Task

Swipe to show code editor

Create a string variable and store the name 'Alex' in it.
Output its value to the console.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

main


              12345678910
            
#include <iostream>

int main()
{
    // The '\0' is a null terminator, used to indicate the end of the string
    // It ensures that the array of characters is treated as a proper string
    char word[6] = { 'H', 'e', 'l', 'l', 'o', '\0' };  
    std::cout << word << std::endl;
}

As you can see, initializing a character array can be tricky. Moreover, modifying the text, such as adding more characters, requires redefining the array with additional memory.

Thankfully, you can use the string class, which simplifies this process significantly.

string


              1
            
std::string text = "Any text in double quotes";

So you can assign to a string any text within double quotes " ". Also, adding more text to a string is as easy as using the .append() method. Here is an example:

main


              123456789101112
            
#include <iostream>

int main()
{
    // Declare and initialize a string
    std::string word = "Codefinity";
    std::cout << word << std::endl;
    
    // Use the append() method to add ".com" to the string.
    word.append(".com");  
    std::cout << word << std::endl;
}

Besides .append(), there are many other methods of a string to allow you efficiently operate with text data. Here is the table with some. They will be discussed in more detail in later chapters.

Task

Swipe to show code editor

Create a string variable and store the name 'Alex' in it.
Output its value to the console.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 3. Chapter 2

Switch to desktop for real-world practiceContinue from where you are using one of the options below