C++ Data Types

C++ Data Types

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1. Introduction

Provides a foundational overview of arithmetic operations and their pitfalls, data types, and the importance of specifying types.

Arithmetic Operations

Division int and double

Specifying a Type

2. Numerical Data Types

short, int, long, float, double, etc. are all numerical data types. You will learn about all of them as well as the pitfalls they may conceal.

Numerical Data Types Summary

3. Text Data Type

Covers working with text in C++ using `char` and `string`. You'll learn how to store and manipulate characters, use string methods, index and modify strings, find text, and understand string memory management. By the end, you'll be ready to handle text efficiently in your programs.

Char

Working with String Elements

Changing The String Practice

Finding Text in a String

4. Other Data Types and Concepts

Covers logical values with bool, functions without return values using void, and automatic type deduction with auto. It also explores type conversion, including both implicit and explicit casting, ensuring correct handling of data types.

Boolean Expressions

Implicit Type Conversion

Explicit Type Conversion

Course Content

C++ Data Types

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

Char

The char data type is used to store a single character, such as 'A' or 'w'. In the next chapter, we will delve into combining these characters into sequences to create words, sentences, and more. For now, let’s focus on using char for single-character storage.

main


              1234567
            
#include <iostream>

int main()
{
    char letter = 'G';  
    std::cout << letter << std::endl;
}

Note
char should be specified in single quotes. Even if the character you hold is a number, you should put it in single quotes, '9', not 9.

You can play with the code above to see what happens if you use double quotes or assign numbers without quotes.

The char data type and memory.

To be stored in memory, it is first converted to a number using ASCII table. The binary representation of that number is then stored in memory.
You can take a quick look at the ASCII table below (the first column is not valuable for us).

main


              12345678
            
#include <iostream>

int main()
{
    // Change the number to output different symbol
    char symbol = 100;
    std::cout << symbol;
}

Note
If you assign a number without single quotes to a char (for example, char letter = 76), the compiler assumes that you specified a character already converted to a number.

As you can see from the table, 76 corresponds to L, so the value of letter is 'L'.

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Section 3. Chapter 1

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