Tokens are individual words and punctuation marks in passage of text. In C, program the smallest individual units are known as C Tokens. C has Six types of Tokens
. The Tokens are shown in figure.
Key words & Character set
Instructions in C language are formed using syntax and keywords. It is necessary to strictly follow C language Syntax rules.
Any instructions that mismatches with C language Syntax generates an error while compiling the program.
Keywords should not be used either as Variable or Constant names.
The character set in C Language can be grouped into the following categories.
3. Special Characters
4. White Spaces
White Spaces are ignored by the compiler until they are a part of string constant.
Auto Extern Sizeof
Break Float Static
Case For Struct
Char Goto Switch
Const If Typedef
Continue Int Union
Default Long Unsigned
Do Register Void
Double Return Volatile
Else Short while