Following section will cover how to define,
declare and use various types of variables.
A variable provides us with named storage that our programs
can manipulate. Each variable in C++ has a specific type,
which determines the size and layout of the variable's
memory; the range of values that can be stored within
that memory; and the set of operations that can be
applied to the variable.
The name of a variable can be composed of letters,
digits, and the underscore character. It must begin
with either a letter or an underscore. Upper and
lowercase letters are distinct because C++ is case-sensitive:
There are following basic types of variable in C++
as explained in last chapter:
Type Description
bool Stores either value true or false.
char Typically a single octet (one byte). This is an integer type.
int The most natural size of integer for the machine.
float A single-precision floating point value.
double A double-precision floating point value.
void Represents the absence of type.
wchar_t A wide character type.
C++ also allows to define various other types of variables,
which we will cover in subsequent chapters like Enumeration,
Pointer, Array, Reference, Data structures, and Classes.
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