Hello, C!

Your First C Program

C is one of the most influential programming languages ever created. Developed by Dennis Ritchie at Bell Labs in 1972, it remains the foundation of operating systems, embedded systems, and high-performance software.

C (1972) is ancient technology -- like discovering Vulcan ruins that still power modern civilization.

Program Structure

Every C program needs a main function -- this is where execution begins:

#include <stdio.h>

int main() {
    printf("Hello, World!\n");
    return 0;
}

Let's break this down:

• #include <stdio.h> -- includes the standard I/O library, giving us access to printf.
• int main() -- the entry point. The int means it returns an integer (0 = success).
• printf("Hello, World!\n") -- prints text to stdout. \n is a newline character.
• return 0 -- returns exit code 0 (success) to the operating system.

printf

printf is the most common way to output text in C. It supports format specifiers:

Assembly View

Click Run and then check the Assembly tab to see the ARM64 assembly generated from your C code. You'll see how printf gets compiled into function calls and how string literals end up in the data section.

Your Task

Write a program that prints exactly Hello, C!\n to stdout.