C index
C Introduction
First C Program
Printf and Scanf function
Variable In C
Datatype in C
Operator in C
C Programming Language
C is a general purpose procedure oriented structured based middle level programming language.
It is developed by Dennis Ritchie in 1972 AT & T Bell Lab In USA.
Using C programming easily creating (developed) Software (applications,drivers).
C Supports 32 Keywords, keywords is a Reserve word of C Program Compiler.
C programming is considered as the base for other programming languages, that is why it is known as mother language. It can be defined by the following ways:
2. System programming language
3. Procedure-oriented programming language
4. Structured programming language
5. Middle-level programming language
Note:- C program extension name is ( .c ), it means c program save like first.c.
Editor name In C programming
(It is space where we can write a program)List of C program Editor
Turboc
Turboc++(we can use This editor)
Dev C
Micro Soft visual C++
Unix
How to install turboc++ C program Editor
Download the TurboC++ from the internetDouble click on setup
Complete the setup process then Finish
How to Open TurboC++
Step 1:- Open this PCStep 2:- Open C: (drive)
Step 3:- Open TurboC++ Folder
Step 4:- Open DOXBox
First C Program Coding
#include <conio.h> void main()
{ printf("Hlw C Programming\n"); printf("\n Free net study \n \n elearning")
getch(); }
free net study
elearning
First C Program Snapshot
Note:- \n it is used to break the new line in the current program line.
Input Output Statement in " C "
* printf
* puts
* scanf
* gets
* getch
What is printf:-
It is a library function it is use to print the data on the output screen. It is use under header file of #include <stdio.h>.
What is puts:-
it is a library function it print the data on output screen in string format.
What is scanf:-
It is a library function it accept (input, Enter) data in compile time . it is used under header file of #include <stdio.h>.
What is gets:-
It accept data in run time,it only accept (input) string type format.
What is getch:-
It accept only one character in Run time the program.
Use of Hearder File in C program:-
Using this hearder file easly use the below mention keywords* printf
* scanf
* puts
* gets
* clrscr();
* getch();
* strlen
* strrev
* strlwr
* strupr
* strcpy
* strcmp
* textcolor
* setcolor
* exit();
* delay
What is Variable in C ?
C variable is a named location in a memory where a program can manipulate the data and can cantain a values, This location is used to hold the value of the variable.
How to Define Variable in Program
Syntax:- int num=10;
*variable must be start alphabet
*variable not start number
*variable not use keywords
C TOKEN
In C program, Each and every smallest individual units are known as C tokens.C tokens are the basic buildings blocks in C language which are constructed together to write a C program.
There are six types of Token,they are
Keywords (eg: int, while),
Identifiers (eg: main, total),
Constants (eg: 10, 20),
Strings (eg: “total”, “hello”),
Special symbols (eg: (), {}),
Operators (eg: +, /,-,*)
KEYWORDS IN C LANGUAGE:
C Supports 32 Keywords, keywords is a Reserve word of C Program Compiler.
Keywords are pre-defined words in a C compiler.
Each and Every keyword is perform a specific function in a C program.
What is Datatype in C ?
C Data types are used to define a variable before to use in a program.Data types are defined as the data storage format that a variable can store a data to perform a specific operation.
Operator in C
Constant in C
Constants is a fixed values that the program may not alter (change) during its execution time. These fixed values are also called literals.The basic constants data types like an integer constant, a floating constant, a character constant and string literal. There are enumeration constants as well.