Rules for variables - C++ [1/1]

Rules for constructing variable names:

1.A variable name is any combination of 1 to 8 alphabets, digits or underscores.Some compilers allow variable names whose length can be upto 40 characters.
2.The first character in the variable name, must be a alphabet.
3.No commas or spaces are allowed, within a variable name.
4.No special symbols other than an underscore, can be used in a variable name. 5.Uppercase and lowercase are significant. That is the variable Total, is not thesame as total or TOTAL.
6.The variable name should not be a keyword.
7.White space is not allowed


A Variable is a named location in memory that is used to hold a value that may be modified by the program. All variables must be declared before they can be used. Variables will be declared in three places:inside functions, in the definition of function parameters and outside of all functions. These are local variables, formal parameters and global variables.