First Program in C -GRADE 11- COMPUTER-NEB

A simple "Hello, World!" program in C:

/////////////////////////////////////////////////////////////

#include <stdio.h>

int main() {

    // Print "Hello, World!" to the console

    printf("Hello, World!\n");

    return 0;

}

//////////////////////////////////////////////////////////////

Let's break down the code:

1. `#include <stdio.h>`: This line includes the standard input-output library (`stdio.h`) in our program. This library provides functions like `printf()` and `scanf()` which are used for input and output operations.

2. `int main() { ... }`: This is the main function of our program. All C programs must have a `main()` function, and execution of the program begins from here. The `int` before `main()` indicates that the function returns an integer value, usually 0 to indicate successful execution.

3. `printf("Hello, World!\n");`: This line prints "Hello, World!" to the console. The `printf()` function is used to print formatted output to the console. In this case, we're simply printing the string "Hello, World!" followed by a newline character (`\n`), which moves the cursor to the next line after printing.

4. `return 0;`: This line indicates the end of the `main()` function and returns an integer value of 0 to the operating system, indicating that the program terminated successfully.

To compile and run this program:

1. Save the code in a file named `hello.c`.

2. Open a terminal or command prompt.

3. Navigate to the directory where `hello.c` is saved.

4. Compile the program using a C compiler like `gcc`:

   ```

   gcc hello.c -o hello

   ```

   This command will generate an executable file named `hello`.

5. Run the executable:

   ```

   ./hello

   ```

   You should see "Hello, World!" printed to the console.