2.  C language is very easy and a powerful
computer programming language bbecause it
is very small and structured.
 C language is a Middle level language i.e.
suitable for systems programming.
 It is a case sensitive language.
 It is highly portable language.
 C is a procedural or sequential language.
 It is easy to learn and understand.
 It is a small language

3.  C language was invented by DENNIS RITCHIE
at Bell Laboratories in between 1969 1nd
1973.
 C language was standardized by ANSI in
1989 and known as ANSI C.

5.  Portability- C is a machine independent and
highly portable language.
 Robustness- C has a set of built in functions and
operators.
 Easy to understand and learn as it has only 32
keywords.
 Fast and Efficient
 Flexible- It is not only for system but also for
embedded system commercial data processing.
 Integration with UNIX.
 C has a large library of functions.

6.  Complexity- Difficulty in solving complex
problems.
 Difficult to debug.
 Difficult to modify.
 Error-prone
 Diffficult to write large programs.

7.  Character set
 Data Types
 Constants
 Keywords
 Variables
 Grammer(Syntax & semantics

8.  Documentation Section (optional)
 Link Section (optional)
 Defining Section (optional)
 Global Declaration Section (optional)
 Main Function Section ( )
{
Declaration part
Executable part
}
 Subprogram Section (optional)
 Function 1
 Function 2
 Function n

9. /* This is a sample C program. */
#include <stdio.h>
#include <conio.h>
main ( )
{
clrscr ( );
printf (“Hello n”);
getch ( );
}

10. C program is executed in 3 phases:
 Create a source code file.
[Empty file(input) – Source Code
file(output)]
 Compilation
[Source code file(input) – object
file(output)]
 Linking
[Object File(input) – Executable File
(output)]