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Basic Syntax Of "C" Language

1).Tokens In C Language:-

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");

1.printf
2.(
3."Hello, World! \n"
4.)
5.;(semicolon)

Let Us Describe about these Tokens One By One:-

A.) Semicolons:-

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.
For Example:
printf("Helo");
getch();
Given Above Is Example Of Termination Of Two Statements.

B.)Comments:-

Comments are like helping text in your C program and they are ignored by the
compiler. They start with /* and terminate with the characters */ as shown
below:

/*This Is My First Program*/

       OR
We can use double slash(//) for comment one line as:-

//this is My First Program

C.) Identifiers:-

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, 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:

     mohd            zara         abc     move_name   a_123
     myname50 _temp j    a23b9   retVal

D.)KeyWords:-

The following list shows the reserved keywords in C. These reserved words may not
be used as constants or variables or any other identifier names.

E.)Whitespace:-

Whitespace is the term used in C to describe blanks, tabs, newline characters
and comments. Whitespace separates one part of a statement from another and
enables the compiler to identify where one element in a statement, such as int,
ends and the next element begins.
The FolloWing Example Clears This Concepts:

int day;
float pi;
char name;


there must be at least one whitespace character (usually a space) between int
and age for the compiler to be able to distinguish them.

no whitespace characters are necessary between operators:-
example

Sum=sum+a[i];

No need of space between sum and "=" or "+".
             

                                            That's all about Basic Syntax In "C"
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