Every language has some basic elements and grammatical rules. One should be aware of the basic elements of any language before using the language. The basic elements are character set, variables, datatypes, constants, keywords (reserved words), variable declaration, expression, statements, etc.

C Character Set

The characters that are used in C program are as under:

UpperCase and LowerCase Letters

  • A, B, C, ………………Z
  • a,b,c,………………….z

Digits

  • 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Graphic Characters

CharacterNameCharacterName
+plus signminus sign (hyphen)
*asterisk%percent sign
\backward slash/forward slash
<less than sign=equal to sign
> greater than sign_underscore
(left parenthesis
{left braces
[left bracket
,comma
single quotes
:colon
?question mark
&ampersand
~tilde sign
#hash