Char Data Type

 the char is used to storing  simple character  

 Unsigned: It consist only positive value i.e 0 to 255.

Signed: It consist both negative and positive values but in different formats like

-1 to -128

• 0 to +127

And this all explanation is about 8 bit number system
Char has 1 byte only 

int main()
{ 
  char a ;

etc