Zig Demo Examples

Practice programs, one file each. Every demo is self-contained — copy it, modify it, and run it. Each file @imports only the standard library, so nothing else needs installing.

How to use: click View to open a file in the code viewer, read its comments, download it to your machine, and run it with the Zig toolchain. Most demos need only zig run <file>; the tests demo uses zig test.

zig run 01_hello.zig     # compile and run
zig test 13_tests.zig    # compile and run the test blocks

Foundations

Syntax, variables, control flow, and functions from PHASE 1 and 2.

#	Description	Link
1	Hello, World	View
2	Variables and Types	View
3	Control Flow	View
4	Functions and defer	View

The Core of Zig

comptime, pointers, optionals, and errors — the PHASE 3 pillars.

#	Description	Link
5	comptime Generics	View
6	Pointers and Slices	View
7	Optionals and orelse	View
8	Errors as Values	View

Memory & Data

Allocators, strings, and data modeling from PHASE 4.

#	Description	Link
9	Allocators: GPA and Arena	View
10	Strings and Formatting	View
11	Structs and Tagged Unions	View

Tooling

Files, testing, and command-line programs from PHASE 5.

#	Description	Link
12	File I/O	View
13	Unit Tests and Leaks	View
14	Command-Line Arguments	View