Variables in C++ are used to store values that can be manipulated or used by the program. To declare a variable in C++, you need to specify the data type of the variable and give it a name. Here’s an example:
int x; // declares a variable called x of type int
This declares a variable called x of type int. The variable x can now be assigned a value, like this:
x = 42; // assigns the value 42 to the variable x
Alternatively, you can declare and initialize a variable in a single statement, like this:
int y = 10; // declares and initializes a variable called y of type int with the value 10
C++ has several built-in data types, including:
Here are some examples of variable declarations and assignments for each of these data types:
float f = 3.14159;
double d = 3.141592653589793;
bool b = true;
char c = 'a';
In addition to these built-in data types, C++ also allows you to define your own custom data types using structures and classes.
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