Who Else Wants To Know The Mystery Behind C++ Variables?

C++ Variables

Variables are containers for storing data values.

In C++, there are different types of variables (defined with different keywords), for example:

int - stores integers (whole numbers), without decimals, such as 123 or -123

double - stores floating point numbers, with decimals, such as 19.99 or -19.99

char - stores single characters, such as 'a' or 'B'. Char values are surrounded by single quotes

string - stores text, such as "Hello World". String values are surrounded by double quotes

bool - stores values with two states: true or false

Declaring (Creating) Variables

To create a variable, specify the type and assign it a value:

Syntax

type variableName = value;

Where type is one of C++ types (such as int), and variableName is the name of the variable (such as x or myName). The equal sign is used to assign values to the variable.

To create a variable that should store a number, look at the following example:

Example

Create a variable called myNum of type int and assign it the value 15:

int myNum = 15;

cout << myNum;

You can also declare a variable without assigning the value, and assign the value later:

Example

int myNum;

myNum = 15;

cout << myNum;

Note that if you assign a new value to an existing variable, it will overwrite the previous value:

Example

int myNum = 15; // myNum is 15

myNum = 10; // Now myNum is 10

cout << myNum; // Outputs 10

Comments

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