Skip to main content

Lexicon of C programming language

By

This article introduces you to various components of C- language statements .
C-Tokens are the essential part of  a C-compiler . A token is an individual entity of a C - program.C-statements having keywords , Identifiers , Constants , Strings , Operators and special symbols are called C-tokens.

CHARACTER SET in C language includes alphabets (used to write C -statements and character constans) ,  digits  (used to assign numeric data) , special symbols (used for special purposes such as to create relational statements and assignment statements). There are 30 special symbols like <,>,<=,>=,== and many others and at last are white spaces.

KEYWORDS and IDENTIFIERS

  Every word in C - language is a keyword or an identifier. Keywords cannot be used as a variable name , these are reserved words. For example: auto , break , case , else , struct  etc.
While Identifiers refer to name of user-defined variables , arrays , functions (we will discuss about arrays and functions  later in next articles). Identifiers should not start from a digit and are case - sensitive. For example : pay , roll_no , s , S etc.

CONSTANTS

Constants refer to fixed values that the program may not alter . Constants can be of any of the basic data type.These uses secondary storage area. Some valid constants are : 52.7 , -43.4 , " Gimibits" , 'M' etc.

VARIABLES

A variable is a value that can change at any time. It is a memory location used to store a data value .
* A variable name should be carefully chosen by the programmer so that its use is reflected in the entire program.
* It contains name of a valid identifier .

For example : area , simple , std1 etc.
A declaration begins with data type, followed by name of one or more Variables . For example ,
          int roll_no,marks;

prev
next

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Removing HTML Tags from string in C#

By
Hello friends, With this very first post of our new Blog GimiBits, we start our whole new journey contributing to information technology. Our First post is about the logic to remove the HTML tags from the given string with C# (C Sharp) programming language. Logic is very Simple to Implement, we take up a string and for its each index char we find the opening '<' braces and ignores the inside content until the closing '>' braces is not encountered and save to another char[] datatype. Here is a function based Implementation of the logic:  public string RemoveHtmlTags(string Html)         {             string content = Html;             char[] array = new char[content.Length];             int arrayIndex = 0;           ...
Post a Comment
Read more

Top 10 Best Video Editing Apps for Android

By
            Top 10 Best Video Editing Apps for Android                                                                                                                       Magisto Video Editor & Maker Magisto Video Editor  automatically  turns your photos and video clips into  magical  music videos that you’ll want to share with friends and family on Facebook, Instagram and more. Magisto Video Maker has over  80 million  happy users worldwide and was featured in  Google Play Editors’ Choice , Google's list of  Best Android Apps of 2015  and CES best app of the year! Express your creativity - make a movie an...
2 comments
Read more

C-Operators

By
An operator is a symbol that operates on a certain data types and produce the output as the result of the operation. Category of Operators • Unary Operator An unary operator is an operator which operates on one operand that is it operates on itself.            Operand1 operator Here Operand1 may be a variable , a constant or an expression etc.    For example: -b , ~a , x+1 etc. • Binary Operator A binary operator is an operator which operates on two operands. Operand1 operator Operand2 Here Operand1 and Operand2 maybe a variable, a constant or an expression etc. and Operator must be either arithmetic type or relational type or logical type etc.    For example: a+b , a && b , etc. • Ternary Operator A ternary operator is an operator which operates on 3 operands. Operand1 o perator Operand2 operator Operand3   Here Operand1 , Operand 2 , Operand3 may be a variable ...
Post a Comment
Read more