Hello

Your First Blink Sketch

Build and understand the classic Blink program line by line, learn pinMode, digitalWrite, and delay, and see how to make blinking non-blocking with millis().

Your First Tcl Script

Write, run, and extend a first Tcl script — from a simple puts statement to procedures, control flow, and a minimal Tk GUI.

Your First D Program

Write, compile, and run your first D program, and understand the module, import, and main() concepts every D file relies on.

Your First Haskell Program

Writing, compiling, and running a first Haskell program, from a one-line Hello World to a small interactive do-notation example.

Your First C++ Program (Hello World)

Write, compile, and run your first C++ program — the classic Hello World example — with a line-by-line explanation of every part.

Hello World and Project Structure

Breaks down the anatomy of a minimal C# console project — Program.cs, the .csproj file, and how top-level statements simplify the classic Hello World example.

Hello World and Ruby Syntax

Write your first Ruby program and learn the fundamental syntax conventions: statements, indentation, method calls, and file structure.