Learn Assembly
A free, interactive online Assembly course. You write real x86-64 code on every lesson, with AI hints when your program segfaults or the registers don't hold what you expected, and a free certificate when you finish.
1,087+ codders enrolled
73 lessons57 challenges434 quiz questions
- Beginner friendly
AI-assisted coding help
Hands-on interactive lessons
Audio narration on every lesson
Quizzes to test your knowledge
Free certificate of completion
Syllabus
Section 1
Fundamentals
Start sectionStartBuild a strong foundation with essential concepts and basic skillsThe Machine
6 lessons51Number Systems
7 lessons59First instruction - MOV
9 lessons967Data Definition
8 lessons862Exit Syscall
4 lessons326Write Syscall
8 lessons862Hello World
Project3 lessons27Section 2
Arithmetic and Control Flow
Start sectionStartBuild on Assembly Fundamentals with integer arithmetic, comparisons, loops, bit masks and indexed arrays. Practice each concept with focused code, mastery challenges and tested programs.Integer Arithmetic
5 lessons920Comparisons and Branches
5 lessons920Building Loops
5 lessons920Bitwise Operations
5 lessons920Arrays in Memory
5 lessons920Final Challenges
3 lessons3
Learn by Doing
Write real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.
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January 2026
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Double or Nothing
Day 5 of 7
Streak Freeze
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Code Anywhere
Take your coding journey on the go! No setup, no downloads: just open and start coding. Available on iOS, Android and Web with 4.9 star ratings.
You're Not Alone
Compete on global leaderboards, invite friends to earn rewards, and celebrate each other's wins. Coding is better with friends!
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Promotion zoneEvery way to learn
Read, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.
A variable is a named container that stores a value you can reference later in your program.
In Python, you create one by writing the name, an equals sign, then the value you want to store.
The value can change over time. Reassigning the name simply points it to a new value.
Earn a Certificate
Earn certificates for every course you complete. Add them to your LinkedIn profile and resume to showcase your coding expertise to employers.
Certificate of CompletionPython Fundamentals
Add to LinkedInWhy learn Assembly with Coddy
- Write and run real x86-64 Assembly in your browser. No NASM install, no linker setup, no Linux VM - each lesson assembles your code with
nasm -f elf64, links it withld, runs it server-side, and shows the output and any errors instantly. - Assembly the way it actually works: registers (
rax,rdi,rsi,rdx), themov/add/cmp/jmpinstruction set, the stack, memory sections (.data,.bss,.text), labels, and talking to the kernel directly through theread,write, andexitsyscalls - no libc hiding the details. - AI hints walk you through the parts that trip everyone up - why a program segfaults, which register a syscall expects its argument in, the difference between a value and the address that holds it, and how the stack grows - so you build the right mental model of the machine from lesson one.
- Free Assembly certificate when you finish. A credible signal for systems, embedded, reverse-engineering, security, and compiler roles - the kind of work where knowing what the CPU actually does sets you apart.
Frequently asked questions about learning Assembly
What is Assembly used for?
Assembly is the human-readable form of the instructions a CPU runs directly. It's used where you need full control or full understanding of the machine: operating system kernels and bootloaders, embedded and firmware code, performance-critical inner loops, compilers and JITs, reverse engineering, and security research (exploit development, malware analysis). Even when you never write it day to day, reading Assembly is how you understand what your high-level code actually compiles to.
Is Assembly hard to learn?
print, just bytes and syscalls. The course introduces one idea at a time, starting from a single write syscall and building up to input, arithmetic, loops, and the stack, so the machine model clicks gradually instead of all at once.Which Assembly does this course teach - x86, ARM, NASM?
mov rax, 1), assemble with nasm -f elf64, and link with ld. The concepts - registers, memory, the stack, syscalls - carry directly over to ARM and other architectures later.Do I need to install NASM or a linker to take this course?
ld flags to remember, and no virtual machine to set up - you write x86-64 Assembly in the browser and press Run.Should I learn C before Assembly?
It helps but isn't required. If you already know C, Assembly demystifies what pointers, the stack, and function calls really are at the hardware level. If you don't, this course still starts from zero - it just means a few ideas (memory addresses, the stack) are brand new rather than familiar. Many people actually understand C far better after seeing the Assembly it compiles to.
Do I get a certificate after the Assembly course?
Yes. Finishing the Assembly course gives you a free certificate of completion - a verifiable signal you can add to your resume or share on LinkedIn alongside any low-level, systems, or reverse-engineering projects you've built.
