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How To Create and Run C Program Online [Updated]

Run a C program using an online C compiler

Table of Contents

C programming language is widely used in the world of computer programming due to its efficiency and versatility. So, we are going to throw light on the essential steps to create and run C programs. The C programming language’s efficiency and versatility make it a pillar of computer programming.

We’ll guide you through the process, from choosing an appropriate compiler to incorporating the important “stdio.h” header file for the input and output operations of the program. Whether you’re a beginner or an experienced coder, mastering these fundamentals is key. Let’s start with the different compilers available for C language:

Top C Compilers

Coding Ninjas Online C Compiler
Repl.it
OnlineGDB
JDoodle
Tutorialspoint
CodeChef
Programiz
OneCompiler
W3school
myCompiler

Steps of Creating and Running C Programs

Step 1: Choose an Online C Compiler

To get started, you must choose an online C compiler that allows you to write, compile, and execute C programs directly from your web browser. Several online platforms provide C compilers, such as ideone.com, repl.it, and tutorialspoint.com.

Step 2: Open the Online C Compiler

Open your preferred web browser and navigate to your preferred compiler’s website. Look for the “Online C Compiler” section or use the search bar to find it quickly. Click on the link to access the compiler.
Let assume you open the programiz compiler that look like this :

Step 3: Create a New File

Once you have accessed the online C compiler, you will typically find a text editor area where you can write your C code. Start by creating a new file. To include the necessary input/output functionalities, add the following line at the beginning of your code:

#include <stdio.h>

The “stdio.h” header file contains functions and macros for input and output operations such as “printf” and “scanf“.

Step 4: Write Your C Code

After including the “stdio.h” header file, you can start writing your C code. The code can range from a simple program to complex algorithms, depending on your requirements. For illustration purposes, let’s consider a simple “Hello, World!” program in Programiz compiler. Write the following code in the editor like that:

Step 5: Save and Compile the Code

Once you have written your C code, it’s time to save the file. Most online C compilers provide a way to save the code by clicking a “Save” button or using a keyboard shortcut. Save your file with an appropriate name and the “.c” extension. After saving, you can proceed to compile the code. In the online C compiler interface, there should be a “Compile” or “Run” button. Click on it to initiate the compilation process. The compiler will check for any syntax errors in your code. Output will be look like this in Programiz compiler :

Step 6: Fix Syntax Errors

If the compiler encounters syntax errors in your code, it will display error messages indicating the line and nature of the error. Review the error messages carefully, identify the issues, and correct them. Syntax errors are common, especially when learning or experimenting with new concepts. Let’s create an error in the program we write in programiz and understood how it looks :

Step 7: Run the Program

Once your code is error-free, it is ready to be executed. Click the “Run” or “Execute” button in the online C compiler interface. The program will start running, and the output will be displayed in the output console.After completing all the syntax errors in the code, it will execute properly and following output will print on programiz compiler :

Congratulations! You have successfully created and run your first C program.

Step 8: Test and Modify

After running your program, you may want to test different scenarios or modify the code to achieve desired results. You can experiment by adding new functionality, implementing algorithms, or taking user input. Remember to save your changes and recompile the code to ensure it runs correctly.

Conclusion

Creating and running a C program is straightforward, especially when utilizing an online C compiler. By following the step-by-step guide outlined in this article, you can write, compile, and execute C programs effectively.

Remember to include “stdio.h” header file to enable input and output operations. So, get started, explore the vast capabilities of C programming, and embark on your coding journey confidently.

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