Below is a list of the Data Types definition.

INTEGER ( INT ) - All numeric items with no fractional part belong to integer type

Three (3) Integer Modifiers

- Unsigned Int : It can store positive range of values
- Short Int : It can store a limited range values
- Long Int : It can store high values and negative values

FLOAT - all numeric data including fractional part

CHARACTER ( CHAR ) - all single characters used in the programs belong to the character type

DOUBLE - the higher precision of floating point

STRING - a sequence or set of characters including blank space

BOOLEAN - represents the values : TRUE or FALSE

Although only two values are possible, they are rarely implemented as a single binary digit for efficiency reasons.

FUNDAMENTAL DATA TYPES

 -  A data type simply means a type or category of data. The way a particular value is represented in memory is determined by its data type.

 - Refer to the classes of data that can be manipulated by C++ programs.

Data Types

- Numerical Integer Type (int)

- Character Type (char)

- Boolean Type (bool)

- Floating 

- Double

- String

Summary of the Basic Fundamental Data Types in C++

References : http://www.cplusplus.com/

Variables and Data Types with sample Programs

Variables - a portion of  memory to store a determined value.

Identifiers - are used as names for variables and other items in a C++ program.

Valid Identifiers - is a sequence of one or more letters, digits or underscores characters. Neither spaces nor punctuation marks or symbols can be an identifiers.

You have to consider when inventing your own identifiers is that they cannot match any of the reserved keywords of the C++ language nor your compilers specific ones, which are reserved keywords.

The standard reserved keywords are:

asm, auto, bool, break, case, catch, char, class, const, const_cast, continue, default, delete, do, double, dynamic_cast, else, enum, explicit, export, extern, false, float, for, friend, goto,

if, inline, int, long, mutable, namespace, new, operator, private, protected, public, register,

reinterpret_cast, return, short, signed, sizeof, static, static_cast, struct, switch, template,

this, throw, true, try, typedef, typeid, typename, union, unsigned, using, virtual, void, volatile, wchar_t, while

Alternative representations for some operators cannot be used as identifiers since they are reserved words under some circumstances:

and, and_eq, bitand, bitor, compl, not, not_eq, or, or_eq, xor, xor_eq