Writing first C program - Mini Project: Build & Apply

Writing first C program

📖 Scenario: You want to create a simple C program that prints a friendly greeting message on the screen. This is like writing a short note to say hello to your computer.

🎯 Goal: Build a C program that prints the message Hello, World! to the console.

📋 What You'll Learn

Create a main function

Include the stdio.h header

Use printf to display the message

Return 0 from main

💡 Why This Matters

🌍 Real World

Printing messages is the first step in learning how to communicate with a computer using code.

💼 Career

Understanding basic program structure and output is essential for all software development jobs.

1

Include the standard input-output header

Write the line #include <stdio.h> at the top of your program to include the standard input-output library.

C

# Your code here

Need a hint?

This line tells the computer to include the code needed to print messages on the screen.

2

Create the main function

Write the line int main() followed by an opening curly brace { to start the main function.

C

#include 

# Your code here

Need a hint?

The main function is where your program starts running.

3

Print the greeting message

Inside the main function, write the line printf("Hello, World!\n"); to print the greeting message.

C

#include 

int main() {
    # Your code here
}

Need a hint?

The \n adds a new line after the message.

4

Close the main function and return 0

Add the line return 0; and then a closing curly brace } to end the main function.

C

#include 

int main() {
    printf("Hello, World!\n");
    # Your code here
}

Need a hint?

Returning 0 means the program finished successfully.