First Welcome C Program - Key Concept ( Beginners)

First Welcome C Program - Key Concept ( Beginners)
Table of Content
- Click & go to directly on the part of video
0:25 Introduction
3:14 Theory Presentation

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First program

void main()
{
clrscr();
printf(“Welcome ! to C Programming Language”);
getch();
}
Points to be noted
C programming language is a procedural programming language.
It is a collection of functions and keywords. For each work there is a function. We need to know about these function to develop C program.
These related functions are stored in a file. These files are known as header file.
Ex. Stdio.h, Conio.h, Math.h and more
As other languages, C programming language has some reserve words and defined rules for using these reserve words.
Ex. #include – It is a reserve word of C. It is used for include header files in C Program. The rules / syntax for using this reserve word is as follows.

Among all library function there is a main function. It is starting / first executing function. It is known to the C compiler that the program has to start from the main function. The syntax of main function is as follows.
void main()
{
Code Block of main function;
Each line in this block is known as statement
Each statement must be terminated with semicolon ( ; )
}
Output Function in C:
printf(-) is used for displaying output in C Program. It is stored in stdio.h header file. So, we need to include their header file in our program.
Example :
printf(“Welcome ! to C Programming Language”);

Other Important Function for First Program:
clrscr() is used for clearing the output screen of C Program. It is stored in conio.h header file.
getch() is used for taking a character input. But we can use this function to hold the output screen. This function belongs to conio.h header file.
Home work
Write all above theory of C’s First Program in your copy.
Understand and remember all above theory.


Next topic to be discussed
Reserve Words of C Programming Language
Input Function in C Programming Language.

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Please watch: "Type Cast Operator in C++ (static_cast ऑपरेटर के बारे में जानें ...)"
https://www.youtube.com/watch?v=RYjOzfo3w78
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