Hello World Program in C

Hello World Program in C

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Vikram
Vikram Singh
Assistant Manager - Content
Updated on Mar 27, 2024 11:29 IST

Start your coding journey with the introductory program, i.e., Hello World Program in C. This is one of the most simple but powerful programs that give you the idea of simple functions and syntax of the c programming language. This article explains how to execute the hello world program in C.

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Hello World program in C is a basic and introductory program for beginners who just started to learn the C programming language. The Hello World program is simple, as it explains the language’s basic structure and syntax rather than the complex logic.

In this article, we will learn how to write the Hello World program in C with the help of examples. Later, the article will also discuss some tips and tricks to learn the C programming language, and at the end, what are the common mistakes you must avoid while learning C programming language.

Must Read: What is C Programming?

Must Check: Top C Programming Online Courses and Certificates

Setting Environment and Understanding the Structure of C Program

Before writing your first code, you must set up the right environment, i.e., installing the text editor and compiler to turn your code into the executable program.

  • A text editor is a place where you write the code.
    • You can start with a simple note and move to an advanced text editor like Visual Studio Code.
  • The compiler is the tool that translates your code into a language that can easily understand by your computer.
    • Here, you can use GCC (GNU Compiler Collection).

A C program consists of one or more functions, but the top most important functions that we will use while writing the program in C language are: 

main()‘ and ‘printf‘.

  • ‘main()’ function is the place where the execution of the program begins.
  • ‘printf’ is used to output text to the console.

Writing the Hello World Program in C

 
#include <stdio.h>
int main() {
printf("Hello, World!");
return 0;
}
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Output

Hello, World!

Explanation

  • The #include <stdio.h> is a preprocessor directive that includes the content of ‘stdio’ library.
    • stdio library is a standard input and output library.
      • It contains the printf function that takes the input and displays the respective output.
      • If the printf command is used without #include <stdio.h>, the program will not be compiled, and the execution of the program will start from the main() function.
      • The printf command is used to display the output on the screen; here, it will be Hello world.
    • return 0 is used to exit the program.

Next Step After the Hello World Program

It’s just a start, and there’s much more you must learn and explore to master C programming. You have to master the concepts like loops, conditionals, arrays, pointers, and many more. 

So, stay focused and practice regularly.

Here are some tips & tricks that you can follow while learning the C programming concepts.

Tips & Tricks to Learn C Programming

  • Understand the Basics: Learn variables, data types, operators, loops and control structure.
  • Practice Regularly
  • Work on Different Real Life Projects
  • Learn the concepts of Debugging
  • Understand the concepts of Memory Management
  • Make a practice of writing comments in between the program
  • Follow standard coding standards

Common Mistakes to Avoid While Learning C Language

  • Ignoring the basic concepts
  • Not understanding Pointers
  • Memory Leakes
  • Ignoring Compiler Warnings
  • Not Using Comments
  • Writing too complex codes
  • Ignoring Error Handling
  • Not Using Version Control

Advance Concepts

Here are three more ways you can Write Hello World Program in C using a:

Character Array

 
#include <stdio.h>
int main() {
char message[] = "Hello, World!";
printf("%s", message);
return 0;
}
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Pointer to a String

 
#include <stdio.h>
int main() {
char *message = "Hello, World!";
printf("%s", message);
return 0;
}
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Function

 
#include <stdio.h>
void printMessage() {
printf("Hello, World!");
}
int main() {
printMessage();
return 0;
}
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Note: The output of all the above three program will be Hello, World!.

Conclusion

Hello World Program in C is one of the first and introductory program that every beginner writes while learning the C programming language. In this article, we have briefly covered how to write the Hello World program in C and give the explanation how the program is executed.

Later in the article, we have listed some Do’s and Don’t you have to follow while learning the C programming language.

Hope you will like the article.

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FAQs

How do you write Hello World in C?

The hello world program in C can be written using main function, character array, pointer to string method and functions.

What will be the output of the Hello World Program in C?

The output of the hello world program in C is Hello World.

How to write a program in C language?

Writing a program in C involves a few steps First, you write your code in a text editor. This could be a simple program like Hello World or something more complex. Once your code is written, you need to compile it using a C compiler. This translates your code into a language that your computer can understand. After your program is compiled without any errors, you can run it. This will execute the instructions you've written in your code.

About the Author
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Vikram Singh
Assistant Manager - Content

Vikram has a Postgraduate degree in Applied Mathematics, with a keen interest in Data Science and Machine Learning. He has experience of 2+ years in content creation in Mathematics, Statistics, Data Science, and Mac... Read Full Bio