Enum DataType in C

The enum statement
ENUM is closely related to the #define preprocessor.
It allows you to define a list of aliases which represent integer numbers. For example if you find yourself coding something like:

#define MON 1
#define TUE 2
#define WED 3
You could use enum as below.
 enum week { Mon=1, Tue, Wed, Thu, Fri Sat, Sun} days;
 or
 enum escapes { BELL = '\a', BACKSPACE = '\b', HTAB = '\t',
 RETURN = '\r', NEWLINE = '\n', VTAB = '\v' };

 or
 enum boolean { FALSE = 0, TRUE };

An advantage of enum over #define is that it has scope This means that the variable (just like any other) is only visable within the block it was declared within.