Hello, World!

Your First HolyC Program

HolyC is the programming language Terry Davis created for TempleOS — a C dialect with a unique, direct relationship between code and execution. HolyC programs run immediately: there is no main function required. Top-level statements execute as soon as the file is compiled.

Printing Output

The built-in Print function (capital P) outputs text to the screen. It works like printf in C — the first argument is a format string, and it supports format specifiers like %d for integers and %s for strings:

Print("Hello, World!\n");

The \n is a newline character. HolyC uses the same escape sequences as C.

No Main Function

Unlike C, Go, or most compiled languages, HolyC does not require a main function. The file itself is the program — the compiler JIT-compiles and executes statements top to bottom:

// This runs immediately
Print("TempleOS lives!\n");
Print("HolyC is simple.\n");

About TempleOS

TempleOS was an operating system created by Terry A. Davis between 2003 and 2013. It was a complete, from-scratch OS including its own compiler, filesystem, graphics, and shell — all written in HolyC. The entire codebase was 100,000 lines of code, written by one person.

Terry believed God specified a 640×480, 16-color display and simple, direct computing. Every aspect of TempleOS was a reflection of that vision.

Your Task

Write a program that prints exactly Hello, World! followed by a newline.