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Enumeration type allows programmer to define their own data type . Keyword enum is used to defined enumerated data type.
enum type_name{ value1, value2,...,valueN };
Here, type_name is the name of enumerated data type or tag. And value1, value2,....,valueN are values of type type_name.
By default, value1 will be equal to 0, value2 will be 1 and so on but, the programmer can change the default value as below:
enum suit{
club=0;
diamonds=10;
hearts=20;
spades=3;
};

Declaration of enumerated variable

Above code defines the type of the data but, no any variable is created. Variable of type enum can be created as:
enum boolean{
false;
true;
};
enum boolean check;
Here, a variable check is declared which is of type enum boolean.

Example of enumerated type

#include <stdio.h>
enum week{ sunday, monday, tuesday, wednesday, thursday, friday, saturday};
int main(){
enum week today;
today
=wednesday;
printf
("%d day",today+1);
return 0;
}

Output
4 day
You can write any program in C language without the help of enumerations but, enumerations helps in writing clear codes and simplify programming.


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