---
title: "C# Basics — By Example (Intro)"
lastModified: "2026-10-07T11:38:29+05:30"
---

Beginner-friendly, runnable C# snippets. Each file has:
- Clear comments explaining syntax and concepts
- A simple `Main` method you can run standalone
- Expected output shown at the top in comments

How to run a single file quickly (one-off):

```
csc 00_HelloWorld.cs && mono 00_HelloWorld.exe
```

Or turn any file into a `dotnet` console project as shown in the repo root README.

Topics:
- 00 — Hello World + Program Structure
- 01 — Variables
- 02 — Data Types
- 03 — User Input
- 04 — Operators & Math
- 05 — Strings
- 06 — Booleans
- 07 — if..else
- 08 — switch
- 09 — while loop
- 10 — for loop
- 11 — break & continue
- 12 — arrays

Tip: Open side-by-side with the corresponding theory pages in this module for deeper context.