What do you understand by Character set in the "C" programing Language ?

What are the character sets in programing language in C Language?

• Character set is a valid character of language for their recognizing.
• The character set in C included upper case and lower characters of alphabets.
• It is included special character and digits.
• Characters set also included White space.
• They can be source characters set in C language.
• Character set are also an execution characters or Escape Sequence.