What is Function in C Language part-2

-

WHAT IS FUNCTION ?


piece of code to accomplish certain operation.

It has a name for identification

There are two types


  predefined functions
  user defined function


EXAMPLE--


function in c,user defined function in c
example of function in c

Types of  functions in C 


Depending on whether a function is defined by the user or already included in C compilers, there are two types of functions in C programming.

There are two types of functions in C:


Standard library functions 
User defined functions

Standard library functions


The standard library functions are built-in functions in C programming to handle tasks such as mathematical computations. I/O processing, string handling etc.

These functions are defined in the header file. When you include the header file, these function are available for use. For example:

The printf() is standard library function to send formatted output to the screen (display output on the screen). This function is defined in "stdio.h" header file.

There are other numerous library functions defined under "stdio.h", such as scanf(), getch() etc.

User-defined functions


As mentioned earlier, C allow programmers to define functions. Such functions created by the user are called user-defined functions.

Depending upon the complexity and requirement of the program, you can create as many user-defined functions as you want.

Working of User-defined function --


#include <stdio.h>
void fun()
{
---------
---------
}
main()
{
----
----
fun();
----
---
}

The execution of  a C program begins from the main() function.

When the compiler encounters fun(); inside the main() function, control of the program jumps to 
'void fun()'.  And the compiler starts executing the codes inside the user-defined function.

The control of the program jumps to statement next to fun(); once all the codes inside the function definition are executed

Comments

Post a Comment

Popular posts from this blog

Notepad, Wordpad and Paint

-
Image
COMPUTER  BASIC COURSE  (From Beginner to Advance Level) Notepad, Wordpad and Ms paint Notepad The Notepad is also one of the products in accessories group of Window operating system. It can be used for writing notes and its also used by programmer to write HTML, JavaScript etc codes. It is useful to for editing and storing all text data. Extension name of Notepad is '.txt' (text) Screen of Notepad Menu Bar Option File Bar                     New   (open new file)                          Open   (open existing file) Save    (save new file) Save As  ( save old file with new name or new place) Print Page   (print your page) Exit (close your current file) Edit Bar Undo (ctrl + z means this command allow you to go back to previous action of file) Cut   ( move you...
Read more

O LEVEL- INTERNET TECHNOLOGY & WEB DESIGN

-
Image
O LEVEL-PAPER 2nd -- M2-R4 : INTERNET TECHNOLOGY & WEB DESIGN THESE ARE THE QUESTIONS WHICH FREQUENTLY ASKED IN    LAST 10 YEARS ----- Definition of SMTP SMTP (Simple Mail Transfer Protocol)  is a  Message Transfer Agent  (MTA). There are two MTAs  client  MTA and  server  MTA. A  client  MTA at clients system sends mail which is received by the  server  MTA at client’s mail server. Further, the client mail server has  client  MTA which sends the mail from client’s mail server to the  server  MTA at recipient’s mail server.  SMTP is a protocol that defines both client-server MTA, on the internet. SMTP protocol is used in the scenario where both the  sender  and  receiver  of mail must be connected to their mail server by  WAN or LAN . SMTP protocol is used two times,  first  between  sender and its mail server  a...
Read more

O LEVEL- INTERNET TECHNOLOGY & WEB DESIGN

-
O LEVEL-PAPER 2nd -- M2-R4 : INTERNET TECHNOLOGY & WEB DESIGN THESE ARE THE QUESTIONS WHICH FREQUENTLY ASKED IN    LAST 10 YEARS ----- MIME Multipurpose Internet Mail Extensions (MIME) is an Internet standard that helps extend the limited capabilities of email by allowing insertion of images, sounds and text in a message. It was proposed by Bell Communications in 1991, and the specification was originally defined in June 1992 for RFCs 1341 and 1342. MIME was designed to extend the format of email to support non-ASCII characters, attachments other than text format, and message bodies which contain multiple parts. MIME describes the message content type and the type of encoding used with the help of headers. All manually composed and automated emails are transmitted through SMTP in MIME format. The association of Internet email with SMTP and MIME standards is such that the emails are sometimes referred to as SMTP/MIME email. The MIME standard def...
Read more