BEST SITE FOR WEB DEVELOPERS
HTML CSS JAVASCRIPT SQL PHP PYTHON JAVA KOTLIN GO C C++ C# AI W3.CSS TypeScript HOW TO More 🔍 ◑ REFERENCES EXERCISES

C++ Tutorial

C++ HOME C++ Intro C++ Get Started C++ Syntax
Syntax Statements
C++ Output
Print Text New Lines
C++ Comments C++ Variables
Declare Variables Multiple Variables Identifiers Constants
C++ User Input C++ Data Types
Basic Data Types Numbers Booleans Characters Strings
C++ Operators
Arithmetic Assignment Comparison Logical
C++ Strings
Strings Intro Concatenation Numbers and Strings String Length Access Strings Special Characters User Input Strings Omitting Namespace C-Style Strings
C++ Math C++ Booleans
Boolean Values Boolean Expressions
C++ Conditions
if else else if Short hand if..else
C++ Switch C++ While Loop
While Loop Do/While Loop
C++ For Loop
For Loop Nested Loops The foreach Loop
C++ Break/Continue C++ Arrays
Arrays Arrays and Loops Omit Array Size Get Array Size Multidimensional Arrays
C++ Structures C++ Enums C++ References
Create References Memory Address
C++ Pointers
Create Pointers Dereferencing Modify Pointers

C++ Functions

C++ Functions C++ Function Parameters
Parameters/Arguments Default Parameter Multiple Parameters Return Values Pass By Reference Pass Arrays
C++ Function Overloading C++ Scope C++ Recursion

C++ Classes

C++ OOP C++ Classes/Objects C++ Class Methods C++ Constructors C++ Access Specifiers C++ Encapsulation C++ Inheritance
Inheritance Multilevel Inheritance Multiple Inheritance Access Specifiers
C++ Polymorphism C++ Files C++ Exceptions C++ Date

C++ How To

Add Two Numbers Random Numbers

C++ Reference

C++ Reference C++ Keywords C++ <iostream> C++ <fstream> C++ <cmath> C++ <string> C++ <cstring> C++ <ctime>

C++ Examples

C++ Examples C++ Compiler C++ Exercises C++ Quiz C++ Certificate

C++ Language. W3Schools in English. Lessons for beginners

Ua Es De

C++ Data Types

❮ Prev Next ❯

C++ Data Types

As explained in the Variables chapter, a variable in C++ must be a specified data type:

Example

int myNum = 5;               // Integer (whole number)
float myFloatNum = 5.99;     // Floating point number
double myDoubleNum = 9.98;   // Floating point number
char myLetter = 'D';         // Character
bool myBoolean = true;       // Boolean
string myText = "Hello";     // String
Try it Yourself »

Basic Data Types

The data type specifies the size and type of information the variable will store:

Data Type Size Description
boolean 1 byte Stores true or false values
char 1 byte Stores a single character/letter/number, or ASCII values
int 2 or 4 bytes Stores whole numbers, without decimals
float 4 bytes Stores fractional numbers, containing one or more decimals. Sufficient for storing 6-7 decimal digits
double 8 bytes Stores fractional numbers, containing one or more decimals. Sufficient for storing 15 decimal digits

You will learn more about the individual data types in the next chapters.

C++ Exercises

Test Yourself With Exercises

Exercise:

Add the correct data type for the following variables:

 myNum = 9;
 myDoubleNum = 8.99;
 myLetter = 'A';
 myBool = false;
 myText = "Hello World";

❮ Prev Next ❯

✍ Comments