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First Program in C Programming Language

Raj is an ardent coder who loves exploring new technology. He is an IT pro with 9 years of exp in C#, Angular, React, Vue.

learn to program in c language

learn to program in c language

You might be thinking that you have learnt lot about C language background and now eagerly want to write your first program in C. To do so first of all you need a C compiler, I have been using Turbo C++ compiler for this purpose. Why Turbo C++ compiler why not Turbo C compiler? Because Turbo C++ compiler supports both C & C++ program and if you want to learn C++, you don’t need to change your compiler. One more thing, Turbo C++ compiler provides mouse support which Turbo C compiler doesn’t.

I assume that you have installed C compiler in your PC and now want to try your first program. Here is an example of your first C program which has been developed using Turbo C++ compiler.

How to Write Program in C

#include <stdio.h>

void main()
{
printf("Welcome to C");
}

How to Compile and Run C Program

Just type the above line in the C editor and press Alt + F9 to compile that program. If there is any mistakes, it will show “Error” message otherwise it will show “Success” message. Now press Ctrl + F9 to run compiled program and you will see similar output. If you cannot see anything then press Alt + F5 to see output window.

How Turbo C editor looks when you run it. I use Turbo C compiler on Windows 7

How Turbo C editor looks when you run it. I use Turbo C compiler on Windows 7

You learnt how to program in C and its time to see the result. People start their program with "hello world" program but I start with "welcome".

You learnt how to program in C and its time to see the result. People start their program with "hello world" program but I start with "welcome".

How to Program With C, an Explanation

Let’s understand each and every line of this program. The very first line #include <stdio.h> tells the compiler to include a header filestdio.h” in the program. Header file in C is nothing but collection of various functions. Here we are using "printf()" library function from"stdio.h" header file. The next line is "void main()" which is the beginning of the program. Every program must have a "main()" because program starts execution from this function (read more about main function here). But what does the keyword void means before the main(). This means that main function will not return any value to the compiler. I know this is tough to understand now; these things will be discussed in detailed in function page.

The curly open and close braces { } defines the scope of the “main()” function means “main()” function’s boundaries. The line between curly braces printf("Hello, World!"); is the one of function defined in stdio.h whose job is to print message specified in double quotation. At the end of the line there is a semicolon (;) which is the end of that statement. C statements always end with a semicolon (;).

One thing you should keep in your mind that in C program, instructions declared in “main()”, are executed from top to bottom. To understand it better let’s extend the above program.

How to write program in c

#include<stdio.h>
#include<conio.h>

void main()
{
clrscr();
printf("Welcome to C. ");
printf("C is a Programming Language. ");
printf("Hello! How are you?");
getch();
}

C Program Output

Sample C program code for new learner. It's a great language which can teach you lots of thing.

Sample C program code for new learner. It's a great language which can teach you lots of thing.

How to Program With C, an Extended Explanation

The top two lines include two header files “stdio.h” and “conio.h” respectively. The “stdio.h” header file contains “printf()” and “conio.h” file contains “clrscr()” and “getch()”. The “clrscr()” function clears the output screen, means any output shown by previously run program will be erased and that is why we always put them at the beginning. Next is three “printf()” statements which will print three different messages. The “getch()” waits for a keyboard input and if we press any key on keyboard the program exits. So we don’t need to press Alt + F5 to see the output as we did in above program.

The uses of “getch()” function will be discussed later in detail.

How to Program in C Language Poll.

© 2009 RAJKISHOR SAHU

Comments

mikeydcarroll67 on July 12, 2015:

I love the tutorial that you have written!

Padma on December 12, 2013:

Very useful

meehell on December 03, 2012:

cool

unixunited on June 14, 2012:

Nice, Turbo C++ is old though, I would recommend at least using Codeblocks.

Java Programs from India on March 01, 2012:

Great Hub ..... I really think C or C++ are some of the first languages to learn. Initially I started working with C book and then moved to C++. By the time I started learning Java, it was really easy to apply what I had already learned and quickly pick it up.

Khader on January 28, 2012:

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jojie on January 20, 2012:

thanks its too easy to understand

prince roy on January 08, 2012:

yeh i think it is the best language that i learn

Jeffcas on November 24, 2011:

guys can you help me create a program that can compute for the percentage of a grade pleeeaaseee!.. thanks

paul on November 15, 2011:

nice.. this site could help me on my course (information technology) specially the programming languages

God bless you rajkishor09

jatin on November 11, 2011:

very usefull site

Deepak on November 04, 2011:

Cool i am unable to run my program because i have written studio.h instead of stdio.h .After watching this i have run my program

Mukesh K Sharma on October 24, 2011:

my output is more than one page long but i can see only one the last page ..how to view the other pages of my output

neri on June 17, 2011:

thank you it helps me :)

gros on March 18, 2011:

hi my prof asked me to do a program the out put is like this;

0

0

0

0

0

0

0

0

0

0

[1] Bottom

[2] Top

if u press 1 the output will be like this

0

0

0

0

0

0

0

0

0

1

[1] Bottom

[2] Top

then if u press 2

another out put will be like this

1

0

0

0

0

0

0

0

1

it is continues until it will be like this

1

1

1

1

1

1

1

1

1

1

liz on February 20, 2011:

Easy to understand.....I like it.

Keerthi on February 08, 2011:

Verry useful site,thanx the creater

Himesh on January 26, 2011:

yeah its easy 2 undrstnd...!

surya on December 21, 2010:

very easy to understand.....thanks to hubpages

mani on November 24, 2010:

easy way to develop software skills this procedure

VAJITH on November 01, 2010:

ITS EASY FOR BEGINERS TO KNOW ABT :C"

arun on September 26, 2010:

this is useful for our study and proggramming

shashi on September 21, 2010:

its easy to understand

ahnsel on July 18, 2010:

eoooww!!!!mor power guys!!!god bless!b careful??..

silpa on June 16, 2010:

Its very usefull hub.or we can call it as Knowledge Repository.

NAMRATA KALRA on February 08, 2010:

GOOD

kaleem toofan on December 04, 2009:

i just love dis site

nekros729 on December 03, 2009:

Another hello world, but there are quite a few links. ;-)

ammarajamal on December 03, 2009:

it is the most interesting site,which gives lots of information rgarding computer

puarl on November 13, 2009:

how we understand program

brad4l from USA on April 05, 2009:

Cool Hub :)I really think C or C++ are some of the best first languages to learn. I started working through a C book and then switched to C++. By the time I started learning Java, it was really easy to apply what I had already learned to Java and quickly pick it up.

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