Skip to main content
CodeSpeedTest
Languages
Start TypingJump into a test — pick any languageAdaptive TrainingUnlock chars as you master themPractice DrillsFocused sessions targeting weak spotsDaily ChallengesNew coding challenges every dayRace ModeCompete against others in real timeAI OpponentRace against an AI at your WPM levelTournamentsLive coding speed tournamentsArcade GamesZType, Overkill Survival, Glyphica & moreGamificationXP, coins, badges & quests
LeaderboardGlobal rankings for every languageCertificatesEarn verifiable Bronze / Silver / Gold certsActivityDaily streaks & historical analyticsProfileYour stats, badges & achievements
Browse Languages500+ languages with real code examplesBlogTips, guides & deep divesFree ToolsWPM calculator, typing speed report & moreFAQCommon questions answeredGetting StartedNew to CodeSpeedTest?AboutOur story & missionSupportGet help — Pro users get priorityContactGet in touch with the team
Pricing
  1. Home
  2. /
  3. Learn
  4. /
  5. Zig

Learn Zig - 10 Code Examples & CST Typing Practice Test

Zig is a general-purpose, statically typed, compiled programming language designed for robustness, optimal performance, and simplicity. It emphasizes manual memory management, safety features, cross-compilation, and direct interoperability with C, making it ideal for system programming, embedded development, and high-performance applications.

View all 10 Zig code examples →
Zig Counter and Theme ToggleZig Random Number GeneratorZig Todo ListZig Dice RollerZig Countdown TimerZig Prime CheckerZig Temperature ConverterZig Shopping CartZig Name GreetingZig Stopwatch

Learn ZIG with Real Code Examples

Updated Nov 21, 2025

Explain

Zig is a compiled language that provides fine-grained control over memory and system resources.

It combines simplicity with modern safety features like optional types and error handling.

Commonly used in operating systems, game engines, embedded systems, and performance-critical applications.

Core Features

Statically typed with no hidden control flow

Comptime metaprogramming

Direct access to pointers and memory

Simple syntax for performance and clarity

No hidden allocations or runtime surprises

Basic Concepts Overview

Comptime code execution

Error unions and error handling

Optional types and pointer management

Slices, arrays, and structs

Direct C interoperability

Project Structure

src/ - source code files

build.zig - build configuration script

tests/ - test files

lib/ - optional libraries

bin/ - compiled executables

Building Workflow

Write Zig source code in src/ directory

Use `zig build` for compilation

Run tests using `zig test`

Cross-compile using `zig build -Dtarget=...`

Integrate C libraries if needed

Difficulty Use Cases

Beginner: simple CLI applications

Intermediate: memory-safe system utilities

Advanced: cross-platform libraries

Expert: OS or embedded firmware

Enterprise: high-performance computational tools

Comparisons

More memory-safe than C, less than Rust

Simpler syntax than C++

Cross-compilation easier than Go or Rust

Less standard library than C++ or Rust

Closer to hardware than Python or Java

Versioning Timeline

2015 - Initial Zig development by Andrew Kelley

2016-2018 - Early compiler prototypes and community feedback

2019 - Zig 0.5 with LLVM backend

2020s - Stability improvements and C interop refinements

2025 - Mature 1.0 release candidate with broad platform support

Glossary

Comptime: code executed at compile-time

Slice: view into a memory buffer

Error Union: type representing success or error

Optional Type: may contain value or be null

Zig Build: build system and project manager

Installation Setup

Download the Zig compiler for your platform

Add Zig executable to system PATH

Verify installation using `zig version`

Set up project directories with src/ and build.zig

Test sample code with `zig run`

Environment Setup

Download Zig compiler for your OS

Add Zig to PATH

Create project directories

Verify installation with `zig version`

Run sample code to test setup

Config Files

build.zig - build script

src/*.zig - source files

tests/*.zig - test files

lib/ - optional libraries

bin/ - output executables

Cli Commands

zig build - compile project

zig run src/main.zig - compile & run

zig test - run unit tests

zig fmt src/ - format source code

zig init-exe - create a new executable project

Internationalization

Unicode supported in strings

No language-specific limitations

Cross-platform localization possible

Works with multi-byte encodings

Compatible with C libraries internationally

Accessibility

Cross-platform compiler

Open-source and lightweight

Simple syntax for experienced programmers

Command-line usage

Community resources for learning

Ui Styling

Primarily CLI applications

Minimal UI support

Integration with graphics libraries optional

Console output formatting

External libraries required for GUI

State Management

Variables explicitly defined

No hidden runtime state

Memory manually managed via pointers

Error handling via error unions

Optional types track nullable state

Data Management

Slices, arrays, and structs

Pointers for low-level access

Manual memory allocation and deallocation

Optional and error types for safety

Direct C interop data handling

Architecture

LLVM-based backend for code generation

Direct C interop layer

Manual memory and error handling model

Comptime evaluation engine

Static linking and cross-compilation infrastructure

Rendering Model

LLVM-based compilation

Direct memory and pointer access

Compile-time code evaluation

Error-aware execution model

Minimal runtime abstraction

Architectural Patterns

System utilities

Embedded and bare-metal firmware

CLI tools

High-performance libraries

Cross-platform binaries

Real World Architectures

Embedded microcontrollers

System utilities and CLI tools

Networking servers

Game engine low-level modules

Cross-platform static libraries

Design Principles

Simplicity and readability

Safety without runtime overhead

Manual memory control

Cross-compilation first

Predictable performance and behavior

Scalability Guide

Static linking for distribution

Cross-compile for multiple platforms

Optimize memory usage manually

Use slices and pointers efficiently

Parallelize computations with threads where needed

Migration Guide

Port C libraries using Zig’s direct interop

Replace C memory functions with Zig slices/pointers

Refactor error handling using error unions

Move compile-time macros to `comptime`

Adapt build scripts to Zig build.zig system

Performance Notes

Minimize heap allocations

Use slices instead of arrays when possible

Leverage compile-time code generation

Avoid runtime type checks for critical paths

Profile code using standard benchmarking

Security Notes

Manually manage memory to avoid leaks

Validate all input data

Be careful with pointer arithmetic

Use optional and error types to catch failures

Avoid unsafe casts

Monitoring Analytics

Use test coverage with `zig test`

Benchmark performance-critical code

Profile memory usage

Inspect runtime error handling

Track build and cross-compilation logs

Code Quality

Use explicit types and error handling

Minimize unsafe pointer operations

Document `comptime` usage

Keep memory allocations clear

Structure project for maintainability

Practical Examples

Writing a custom memory allocator

Creating a cross-platform CLI tool

Interfacing with a C library

Developing a small embedded firmware

Implementing a high-performance networking server

Troubleshooting

Check pointer usage and memory safety

Handle error unions properly

Ensure comptime code compiles correctly

Verify cross-compilation targets

Inspect build.zig configuration

Testing Guide

Write test functions using `test` keyword

Use `zig test` to execute unit tests

Test pointer and memory safety

Validate cross-platform builds

Use compile-time checks for constants

Deployment Options

Static binaries with no runtime dependencies

Cross-compiled executables for target platforms

Embedded firmware deployment

Dynamic library for C interop

Containerized command-line tools

Tools Ecosystem

Zig compiler (LLVM backend)

zig build system

zig test for unit testing

zig fmt for formatting

C interop tooling

Integrations

C libraries and headers

Cross-compilation for ARM, x86, WASM

Embedded toolchains for microcontrollers

Integration with build systems (Make, CMake)

Foreign function interface (FFI) for Rust/C++

Productivity Tips

Use `zig fmt` for consistent formatting

Leverage `comptime` for compile-time checks

Test code frequently with `zig test`

Cross-compile regularly to verify targets

Document error unions and memory usage

Challenges

Write a memory-safe allocator

Create a cross-platform CLI tool

Build a simple embedded application

Integrate a C library with Zig

Optimize a low-level networking function

Learning Path

Learn basic syntax and data types

Understand slices, structs, and pointers

Practice error unions and optional types

Use `comptime` for compile-time code

Explore C interop and cross-compilation

Skill Improvement Plan

Week 1: Syntax, variables, functions

Week 2: Pointers, slices, memory management

Week 3: Error unions and optional types

Week 4: Comptime metaprogramming

Week 5: Cross-compilation and C integration

Interview Questions

What makes Zig safer than C?

Explain `comptime` in Zig.

How does Zig handle memory management?

How does Zig interoperate with C?

What are error unions and optional types?

Cheat Sheet

var x: i32 = 42 - declare variable

fn add(a: i32, b: i32) i32 { return a+b; } - function

const slice = []u8{1,2,3} - array/slice

errdefer mem.free(ptr) - error-safe cleanup

comptime { ... } - compile-time execution

Books

Programming in Zig

Zig for Systems Programmers

The Zig Programming Language Guide

Cross-Platform Development with Zig

Mastering Zig for Embedded Systems

Tutorials

Zig Language Basics

Memory Safety and Error Handling

Comptime Metaprogramming

C Interoperability in Zig

Building Cross-Platform Zig Projects

Official Docs

Zig Official Documentation

Zig Learn Page

Zig GitHub Repository

Community Links

Zig GitHub Discussions

ZigLang Reddit

Zig Discord

System Programming Forums

LLVM Community (backend support)

Community Support

Zig GitHub Discussions

ZigLang Reddit community

Zig Discord server

System programming forums

LLVM community for compiler issues

Monetization

Commercial libraries

Embedded firmware products

High-performance computing tools

CLI utility software

Game engine components

Future Roadmap

1.0 stable release and ecosystem growth

Expanded standard library

Better package management

More tooling for debugging and profiling

Stronger integration with C and WebAssembly

When Not To Use

Rapid application development

Garbage-collected environments

Large ecosystem libraries required

UI-heavy applications

Managed runtime platforms

Final Summary

Zig is a modern system programming language designed for safety, performance, and simplicity.

It excels at low-level programming, embedded development, and cross-platform compilation.

Zig combines C interoperability, manual memory management, and compile-time code execution.

Ideal for developers who want control over performance and hardware without unnecessary runtime overhead.

Faq

Is Zig production-ready?

Yes - suitable for systems programming and embedded projects.

Can Zig replace C?

It can in many scenarios, with safer and modern syntax.

Does Zig have a garbage collector?

No - manual memory management is used.

Is Zig cross-platform?

Yes - built-in cross-compilation for many targets.

Is Zig suitable for beginners?

Yes, for systems programming basics, though low-level concepts are required.

Code Sample Descriptions

1

Zig Counter and Theme Toggle

const std = @import("std");
var count: i32 = 0;
var isDark: bool = false;

fn updateUI() void {
    std.debug.print("Counter: {d}\n", .{count});
    std.debug.print("Theme: {s}\n", .{ if (isDark) "Dark" else "Light" });
}

fn increment() void {
    count += 1;
    updateUI();
}

fn decrement() void {
    count -= 1;
    updateUI();
}

fn reset() void {
    count = 0;
    updateUI();
}

fn toggleTheme() void {
    isDark = !isDark;
    updateUI();
}

pub fn main() void {
    updateUI();
    increment();
    increment();
    toggleTheme();
    decrement();
    reset();
}

Demonstrates a simple counter with theme toggling using Zig variables and functions.

Let’s Try →
2

Zig Random Number Generator

const std = @import("std");

pub fn main() void {
    var rng = std.rand.DefaultPrng.init(std.time.nanoTimestamp());
    for (0..3) |i| {
        const num = rng.random.int(i32) % 100 + 1;
        std.debug.print("Random #{d}: {d}\n", .{i+1, num});
    }
}

Generates random numbers between 1 and 100.

Let’s Try →
3

Zig Todo List

const std = @import("std");
var todos: [10]?[]const u8 = [_]?[]const u8{null} ** 10;
var count: usize = 0;

fn addTask(task: []const u8) void {
    if (count < todos.len) {
        todos[count] = task;
        count += 1;
    }
}

fn removeTask(index: usize) void {
    if (index < count) {
        for (index..count-1) |i| {
        todos[i] = todos[i+1];
        }
        count -= 1;
    }
}

fn printTasks() void {
    for (0..count) |i| {
        std.debug.print("{d}: {s}\n", .{i+1, todos[i]});
    }
    std.debug.print("----------------\n", .{});
}

pub fn main() void {
    addTask("Buy milk");
    addTask("Write Zig code");
    printTasks();
    removeTask(0);
    printTasks();
}

Adds and removes tasks from a todo list.

Let’s Try →
4

Zig Dice Roller

const std = @import("std");

pub fn main() void {
    var rng = std.rand.DefaultPrng.init(std.time.nanoTimestamp());
    for (0..3) |i| {
        const roll = rng.random.int(u32) % 6 + 1;
        std.debug.print("Roll #{d}: {d}\n", .{i+1, roll});
    }
}

Rolls a six-sided dice three times.

Let’s Try →
5

Zig Countdown Timer

const std = @import("std");

pub fn main() void {
    var count: i32 = 5;
    while (count >= 0) : (count -= 1) {
        std.debug.print("Countdown: {d}\n", .{count});
    }
    std.debug.print("Done!\n", .{});
}

Counts down from 5 to 0.

Let’s Try →
6

Zig Prime Checker

const std = @import("std");

fn isPrime(n: u32) bool {
    if (n < 2) return false;
    for (2..std.math.sqrtInt(u32, n)+1) |i| {
        if (n % i == 0) return false;
    }
    return true;
}

pub fn main() void {
    const nums: [3]u32 = [3]u32{7, 10, 13};
    for (nums) |num| {
        std.debug.print("{d} is {s}\n", .{num, if (isPrime(num)) "Prime" else "Not Prime"});
    }
}

Checks if numbers are prime.

Let’s Try →
7

Zig Temperature Converter

const std = @import("std");

fn cToF(c: f64) f64 { return c * 9.0 / 5.0 + 32.0; }
fn fToC(f: f64) f64 { return (f - 32.0) * 5.0 / 9.0; }

pub fn main() void {
    std.debug.print("25°C = {f}°F\n", .{cToF(25.0)});
    std.debug.print("77°F = {f}°C\n", .{fToC(77.0)});
}

Converts Celsius to Fahrenheit and Fahrenheit to Celsius.

Let’s Try →
8

Zig Shopping Cart

const std = @import("std");
var items: [5]?[]const u8 = [_]?[]const u8{null} ** 5;
var prices: [5]f64 = [_]f64{0} ** 5;
var count: usize = 0;
var total: f64 = 0;

fn addItem(item: []const u8, price: f64) void {
    if (count < items.len) {
        items[count] = item;
        prices[count] = price;
        total += price;
        count += 1;
    }
}

fn removeItem(index: usize) void {
    if (index < count) {
        total -= prices[index];
        for (index..count-1) |i| {
        items[i] = items[i+1];
        prices[i] = prices[i+1];
        }
        count -= 1;
    }
}

fn printCart() void {
    for (0..count) |i| {
        std.debug.print("{s}: ${f}\n", .{items[i], prices[i]});
    }
    std.debug.print("Total: ${f}\n----------------\n", .{total});
}

pub fn main() void {
    addItem("Apple", 2.0);
    addItem("Banana", 3.0);
    printCart();
    removeItem(0);
    printCart();
}

Adds and removes items in a shopping cart with total cost.

Let’s Try →
9

Zig Name Greeting

const std = @import("std");

fn greet(name: []const u8) void {
    std.debug.print("Hello, {s}! Welcome!\n", .{name});
}

pub fn main() void {
    greet("Saurav");
    greet("Alice");
    greet("Bob");
}

Greets users by name.

Let’s Try →
10

Zig Stopwatch

const std = @import("std");

pub fn main() void {
    var time: i32 = 0;
    while (time < 5) : (time += 1) {
        std.debug.print("Stopwatch: {d} seconds\n", .{time});
    }
    std.debug.print("Done!\n", .{});
}

Simulates a stopwatch by incrementing seconds.

Let’s Try →

Frequently Asked Questions about Zig

What is Zig?

Zig is a general-purpose, statically typed, compiled programming language designed for robustness, optimal performance, and simplicity. It emphasizes manual memory management, safety features, cross-compilation, and direct interoperability with C, making it ideal for system programming, embedded development, and high-performance applications.

What are the primary use cases for Zig?

System programming and OS development. Embedded and bare-metal applications. High-performance libraries and tools. Cross-platform and cross-compiler projects. Interfacing with C libraries and APIs

What are the strengths of Zig?

High performance and predictable behavior. Minimal runtime overhead. Cross-platform compilation support. Strong C interop for library reuse. Compile-time code execution for flexibility

What are the limitations of Zig?

Smaller ecosystem than C/C++ or Rust. No garbage collector; manual memory management required. Limited standard library compared to mature languages. Fewer learning resources and tutorials. Some advanced abstractions require verbose code

How can I practice Zig typing speed?

CodeSpeedTest offers 10+ real Zig code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

CReactPythonC++RustTypeScriptKotlinPHPJavaC#RubyMqlCqlN1qlCypherGremlinPartiqlHaskellElixirFsharpView all languages →
CodeSpeedTest

Improve your coding speed, code accuracy, and programming syntax WPM with practice sessions across 500+ programming languages.

Quick Links

HomeAboutFeaturesGetting StartedLanguages

Legal & Support

Pro ⚡ PricingContactPrivacy PolicyTerms of Service

Connect

CodeSpeedTest on GitHubCodeSpeedTest on TwitterEmail CodeSpeedTest

© 2026 CodeSpeedTest. All rights reserved.