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.
A C program consists of various tokens and a token is either a keyword, an identifier, a constant, a string literal, or a symbol. For example, the following C statement consists of five tokens:
printf("Hello, World! \n");The individual tokens are:
printf ( "Hello, World! \n" ) ;
In C program, the semicolon is a statement terminator. That is, each individual statement must be ended with a semicolon. It indicates the end of one logical entity.
printf("Hello, World! \n"); return 0;
Comments are simple text in your C program that increases readability of programs. Compiler ignore anything written as comment in your program.
//This is a comment Single line Comment /*This is a comment*/ Single line Comment /*This is a long and valid comment*/ Multi line Comment //this is not a valid comment Wrong Syntax
A C identifier is a name used to identify a variable, function, or any other user-defined item. An identifier starts with a letter A to Z or a to z or an underscore _ followed by zero or more letters, underscores, and digits (0 to 9).
C does not allow punctuation characters such as @, $, and % within identifiers. C is a case sensitive programming language. Thus, Manpower and manpower are two different identifiers in C. Here are some examples of acceptable identifiers:
lpu abc show_name bhai_1223 sachin30 _start d kke222 HaryaNa