C Language Syntax Rules

C Language Syntax Rules

C language syntax specify rules for sequence of characters to be written in C language. 
The rule specify how character sequence will be grouped together to form tokens. 
A smallest individual unit in c program is known as C Tokens. Tokens are either keyword, identifier, constant, variable or any symbol 
which has some meaning in C language. A C program can also be called as collection of various tokens.

Example of C tokens,

1 int
2 Semicolon (;)

Comments

Comments are simple text in your C program that increases readability of programs. Compiler ignore anything written as comment in your program.

Example of comments :

Single line Comment
//This is a comment

Single line Comment
/*This is a comment*/

Multi line Comment
/*This is a long 
and valid comment*/

Wrong Syntax
//this is not
  a valid comment

Some basic syntax rule for C program

1. C is a case sensitive language so all C instructions must be written in lower case letter.
2. All C statement must be end with a semicolon.
3. Whitespace is used in C to describe blanks and tabs.
4. Whitespace is required between keywords and identifiers