--- title: "Best Coding Class in Letterkenny | Modern Age Coders" description: "Live online coding, Python and AI lessons for Letterkenny learners aged 6 to 67, taught live by a teacher in small ability groups or one to one. First lesson free." canonical: https://learn.modernagecoders.com/best-coding-class-in-letterkenny source: src/pages/best-coding-class-in-letterkenny.html --- > Live online coding, Python and AI lessons for Letterkenny learners aged 6 to 67, taught live by a teacher in small ability groups or one to one. First lesson free. Skip to contentCourse picks for Letterkenny ## Courses Letterkenny learners begin with Choose on age and interest, and let the opening lesson with that course's teacher confirm where the learner should start. [![Coding for Kids course thumbnail](/images/kids-coding.webp)Ages 6 to 10Coding for KidsBlock coding with lists, where item three and item four are different things and it matters which you pick.See the syllabus](/courses/kids-coding-blocks-masterclass)[![Python and AI for Kids course thumbnail](/images/python-kids.webp)Ages 10 to 13Python and AI for KidsPython lists and indexes from the start, including why counting begins at zero.See the syllabus](/courses/python-ai-kids-masterclass)[![Python for Teens course thumbnail](/images/python-teens.webp)Ages 14 to 18Python for TeensReal data files, nested structures and the index arithmetic that turns a flat list back into a table.See the syllabus](/courses/python-complete-masterclass-teens)[![Python Automation Course course thumbnail](/images/python-college.webp)College and adultPython Automation CourseFor adults pulling data from APIs, where a quietly wrong index is worse than a crash.See the syllabus](/courses/python-ai-automation-masterclass-college) Browse the [course atlas](/course-atlas) for more than one hundred options and use the [coding roadmap](/coding-roadmap) to check prerequisites. The four we are known for ### Python, AI, vibe coding and agentic coding These run underneath everything above. Every one is live and online, placed by ability rather than by age, and the first class is free. [![Vibe Coding for Teens course thumbnail](/images/vibe-coding-teens.webp)Vibe codingAges 13 to 17Vibe Coding for TeensPython, web and AI projects where the learner still owns the thinking.See the syllabus](/courses/vibe-coding-for-teens-python-web-ai-projects-course)[![Python Automation Course course thumbnail](/images/python-college.webp)Python and AICollege and adultPython Automation CourseAutomate the work you already do, then let AI carry part of it.See the syllabus](/courses/python-ai-automation-masterclass-college)[![AI and Machine Learning for Teens course thumbnail](/images/ai-ml-teens.webp)AI and MLAges 14 to 18AI and Machine Learning for TeensTrain a model, read what it learned, and be able to say why it is wrong.See the syllabus](/courses/ai-ml-masterclass-teens)[![Codex & Claude Code course thumbnail](/images/codex-claude-code-adults.webp)Agentic codingProfessionalsCodex & Claude CodeRun AI coding agents on real work without losing control of the codebase.See the syllabus](/courses/codex-and-claude-code-ai-coding-agents-masterclass-for-adults-professionals)Signature project ## A table is one long list How the CSO internet access table is actually stored, and what three ways of reading it return for Letterkenny. Every line was run against the downloaded file on 19 September 2026. | Step or mistake | What happens | | --- | --- | | The file's own description of its shape | Statistic 1, census year 1, internet answer 5, area label 868: 4,340 values in one array | | Which dimension varies fastest | The area label, so neighbouring positions hold neighbouring towns for the same answer | | Correct position for Letterkenny broadband | Answer 0 times 868, plus town 688, gives position 688: the value is 6,875 | | Dimensions assumed the other way round | Town 688 times 5, plus answer 0, gives position 3,440: the value is 2, the Other row for Ballybrittas, Co Laois | | One position too far | Position 689 holds 99, the broadband count for Drumkeen, Co Donegal | | One answer too far | Position 1,556 holds 658, Letterkenny's No row rather than its broadband row | ### The shape is data too The order of the dimensions and their sizes travel with the numbers. Code that reads them from the file works on the next table; code that assumes them works until the publisher adds one category, and then silently reads the wrong column. ### The dangerous error is the plausible one Reading 2 for a town of 22,000 people is obviously wrong and gets caught. Reading 99 or 658 might not be. A test that checks one known value against the published table is the cheapest insurance in data work. ### Towns carry identifiers, not just names Each area label in the file has a 36-character identifier; Letterkenny's begins f5f669fb. Names change, repeat and carry accents. The identifier is what a program should join on. ### Numbers that are really names The same trap runs the other way. The HSE prints Letterkenny University Hospital's number as 074 912 5888; store that as a number and it becomes 749125888, zero gone, which we checked in code. Phone numbers, eircodes, school roll numbers, account numbers and product codes are identifiers that happen to contain digits. They are never added up, so they should never be stored as numbers. A learner who asks "would I ever do arithmetic on this?" before choosing a type has avoided a whole family of bugs. The project is a reader for the CSO file format written from scratch, no library. The learner loads the JSON, prints each dimension and its size, writes a function that turns a set of positions into one flat index, and checks it by fetching Letterkenny's five internet answers and confirming they sum to the published total of 8,431. Then they break it on purpose, swapping two dimensions, and write down how quickly they would have noticed if they had not been looking. The last line of the exercise is a single assertion against a known value, kept in the code forever after. Letterkenny in the town tables ## The numbers at position 688, and around it Published for the built-up area Letterkenny, Co Donegal, in the Census 2022 small area tables. | Measured | Count | | --- | --- | | Usual residents | 22,252 | | Households | 8,431 | | Households reporting broadband | 6,875 | | Working residents in the travel table | 9,631 | | Residents travelling to school, college or childcare | 6,068 | | Working residents who work from home at least sometimes | 2,574 | ### The work journey Of the 9,631 working residents, 5,342 drive, 1,281 give home as their main answer, 967 walk, 672 travel as a car passenger, 416 by van, 87 by bus and 66 by bicycle, with 759 not stating. ### The school journey Of 6,068 journeys to school, college or childcare, 3,069 are as a car passenger, 1,217 by bus, 905 on foot and 245 driving, with 555 not stating. ### Internet in full The five answers that sit at positions 688, 1,556 and onwards in the file: 6,875 broadband, 658 no internet, 773 not stated and 125 another connection, totalling 8,431 households. The hospital The HSE lists Letterkenny University Hospital at Kilmacrennan Road, Letterkenny, Donegal, F92 AE81. We name it here as the town's largest public institution with a published address, and because its printed phone number carries the leading zero that the project warns about. We have no connection with the hospital. Reading the file honestly ## Four checks before trusting any value What the Letterkenny exercise turns into, as a routine for any data file a learner loads. | Check | Applied to this file | | --- | --- | | Does the array length equal the product of the dimension sizes? | Yes: 1 times 1 times 5 times 868 is 4,340, the length of the value array | | Do the parts add up to the published total? | Yes: 6,875 plus 658 plus 773 plus 125 is 8,431, the Total answer for Letterkenny | | Does a value you already know come back unchanged? | Yes: position 688 returns 6,875, which matches the town profile | | Is the category order what you assumed? | No: the file lists Broadband, No, Not stated, Other, Total, which is not the order a reader might guess | ### The order of categories is a surprise Nothing says the answers arrive in a logical order. Here Total comes last and Not stated sits between No and Other. Code that assumes an order instead of reading the labels will mislabel every row it prints. ### The order of towns is a surprise too The file starts with Carlingford, Co Louth, not with any alphabetical or population order. Position 688 means nothing about Letterkenny except where it happens to sit in this one file. ### Checks cost seconds Each of the four checks above is one line of code. Together they would have caught every mistake in the project table before a single wrong number reached a report. The theatre An Grianan Theatre describes itself on its own site as an arts, music and comedy venue in Letterkenny, Donegal. We have no connection with it, and none of its prices appears here. Learning in Letterkenny ## How the lessons run from here Two lessons in most weeks, a teacher who is present for all of each one, and work pitched at the learner's level. ### Primary school years Block coding and games, where lists and positions turn up early and naturally. ### Secondary school years Python, working websites and AI projects, with real files and real data once the basics are secure. ### Adult learners Plenty start with no background at all, and 2,574 working residents here already do part of their job from home. The HSE and An Grianan Theatre are named from their own published pages, and neither has any connection with us, nor does Donegal County Council. Census counts are Central Statistics Office figures for this built-up area, printed as published. The array positions, the wrong-index results and the leading-zero example were all produced by running code on 19 September 2026 against the files and pages quoted, and the page reports what the code returned rather than what it ought to have returned. Learning ladder ## From a list of items to a table in a file Treat the ages as a starting guess; the opening lesson decides. Ages 6 to 10 ### First, second, third Lists and positions in block code, and why picking the right item matters. [Coding for Kids](/courses/kids-coding-blocks-masterclass)[Scratch Coding for Kids](/courses/scratch-programming-complete-course)Ages 11 to 13 ### Counting from zero Python lists and indexes, off-by-one errors, and how to test for them. [Python and AI for Kids](/courses/python-ai-kids-masterclass)[Maths Through Coding](/courses/maths-through-coding)Ages 14 to 18 ### Reading real formats JSON, nested data and index arithmetic, with checks against known values. [Python for Teens](/courses/python-complete-masterclass-teens)[Data Science for Teens](/courses/data-science-course-for-teens-python-data)Ages 18 to 67 ### Data pipelines at work Pulling data from APIs and files and proving the right number came out. [Python Automation Course](/courses/python-ai-automation-masterclass-college)[Data and AI Analytics for Non-Programmers (Excel, Sheets, Power BI)](/courses/data-and-ai-analytics-for-non-programmers-course)Coding and AI ## Ask a model to parse this file The code will run. Whether it reads the right cell is another question. Generated parsers for formats like this one often hard-code an assumed dimension order, because the example in the prompt happened to have one. On the next file, or after the publisher adds a category, the same code returns neighbouring values without complaint. It looks finished, it passes a glance, and it reports Drumkeen as Letterkenny. A learner who has built the reader by hand checks three things in any generated version: that it reads the shape from the file, that it verifies one known value, and that the parts add up to the total. None of those takes more than a minute, and together they turn plausible code into trustworthy code. Generating a parser takes seconds. Knowing how it could be quietly wrong is the part a person has to supply. The longer argument is in [why coding is worth a young person's time](/blog/is-coding-worth-learning-2026). Delivery ## The practical arrangements What a Letterkenny household needs to know. ### Live every time A teacher on the call for the whole lesson, working from what is on the learner's screen. ### Groups at one level Five to ten learners at the same stage, joining from Letterkenny, the rest of Ireland and abroad. ### Most weeks, twice Roughly eight lessons a month at the hour chosen when the course begins. ### The school calendar Holidays, mid-terms and exam weeks are allowed for when the timetable is set. ### Equipment A desktop or laptop, a microphone with speakers or a headset, and broadband able to carry an hour of video. ### One to one Where a learner's level has no matching group at a sensible hour, the course goes private. Stored as written A learner's contact number goes into our records as text, leading zero and all, for the same reason the project gives. It is a small thing and exactly the kind that breaks otherwise. Fees ## Letterkenny class fees The whole price list. First class**USD 0** An opening lesson, taught in full and assessed, at no charge. Group tuition**USD 100** A month in a group of five to ten at one level, about eight live lessons. Private tuition**USD 150** A month of private lessons at the same weekly frequency. The monthly price is set in US dollars and is the same for every household outside India, so there is no euro figure to compare it with. Payment follows the decision, never the other way round: course and hour first, invoice second, and the pricing page explains the awkward weeks, from school holidays to a missed lesson or a change of format. Request placement[Check availability](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20arrange%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Letterkenny.)Reviews ## Google reviews from six of our families, as posted Rated 4.9 across 547 Google reviews. These are real reviews, reproduced as written. ★★★★★ "The one step solution for my son. Modern Age Coders make learning coding so simple that kids love it. The teachers explain complex concepts clearly with practical exercises and interactive content." Ria Mukherjee Parent ★★★★★ "Modern Age Coders has been a game-changer for me. I struggled to grasp IT concepts and coding before joining, but their classes transformed everything. I can now confidently write complex programs with ease." Samriddha Mondal Student ★★★★★ "One of the most wonderful education centres out there. Education is not limited to school syllabus but focuses on skill development." Vansh Agarwal Student ★★★★★ "My child Dhairya is really enjoying the Modern Age Coders classes. This is his first online class and he eagerly looks forward to it. I can already see his improvement, and the teachers are very cooperative." Sonam Oswal Parent of Dhairya ★★★★★ "Modern Age Coders have wonderful teachers who teach in a clear, easy and practical way. The teacher boosts students' confidence and inspires them to learn without hesitation." Sonu Goyal Parent ★★★★★ "I highly recommend this computer coding class! The teachers are incredibly knowledgeable and passionate about coding." Ritu Kedia Parent Free placement class ## Book a free Letterkenny lesson Say how old the learner is and what they are into. The first hour is shaped around that and might finish with a game, a working program, or a file read correctly on the second attempt. ### Contact the team directly WhatsApp or call [+91 91233 66161](tel:+919123366161), or email [contact@modernagecoders.com](mailto:contact@modernagecoders.com). This is Modern Age Coders' actual contact, an Indian number, and not an invented Letterkenny one. [WhatsApp Modern Age Coders](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20arrange%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Letterkenny.) Submitted details are used for placement and follow-up. FAQ ## Letterkenny coding class questions What people in Letterkenny ask before they book. ### How many people live in Letterkenny? The Census 2022 small area tables give 22,252 usual residents for the built-up area of Letterkenny, in 8,431 households. Our Donegal page relies on the census town list, a separate product with its own count. ### What is the Letterkenny data project? Learners write a reader for the CSO data format from scratch, find Letterkenny's broadband count at position 688 of a 4,340-number array, and then deliberately swap two dimensions to see the same code return 2, a figure belonging to a different town and a different answer. ### Why would a program return the wrong town without an error? Because every position in the array holds a real number. An index that is off by one or built in the wrong order still lands on a valid value, just the wrong one, which is why checking a known value matters. ### How do Letterkenny residents travel to work? Of the 9,631 working residents in the travel table, 5,342 drive, 1,281 give working mainly at or from home, 967 walk, 672 travel as a car passenger, 416 by van, 87 by bus and 66 by bicycle, with 759 not stating. ### When are lessons scheduled? After school, in the evening and at weekends. Ireland runs four and a half hours behind India while Irish clocks are forward and five and a half once they fall back, and that gap decides which evening slots we can offer. ### Can adults in Letterkenny sign up? Yes, up to sixty-seven. Plenty of adults begin with no coding at all, and the opening lesson settles whether they learn in a matched group or with a teacher alone. ### What does counting from zero mean? Most programming languages number the first item in a list as zero, so the 689th town in the file sits at position 688. It is the most common source of off-by-one mistakes, and the project makes a learner meet it deliberately. ### Is there a Modern Age Coders classroom in Letterkenny? No, and we never imply one. Teaching is live over video only, with no premises in Ireland. A learner needs a laptop or desktop, working sound and a steady connection, and the number shown here belongs to India. ### What do coding classes in Letterkenny cost? The first lesson is free. After that a shared place costs USD 100 a month and brings two live lessons a week, about eight monthly, with five to ten learners; one to one on the same schedule is USD 150 a month. Everything is agreed before payment. ### How many learners are in a group? Five to ten, grouped by ability, pace and goal rather than age or address. Where nothing suitable meets at a workable hour, we teach one to one instead. Explore Ireland ## Around Letterkenny The county is covered on the [County Donegal](/coding-classes-in-county-donegal) page, part of the three-county [Ulster](/coding-and-ai-classes-in-ulster) page for Cavan, Donegal and Monaghan, with [County Sligo](/coding-classes-in-county-sligo) to the south. To see how we compare with other online providers, [start here](/best-online-coding-classes-ireland), and the [Ireland hub](/coding-classes-in-ireland) gathers every town and county page. Book the free class[Message us on WhatsApp](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20arrange%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Letterkenny.)Free Letterkenny class[Call +91 91233 66161](tel:+919123366161) ## Keep exploring Modern Age Coders ### Coding classes in nearby cities - [Best Coding Classes in Limerick](/best-coding-class-in-limerick) - [Best Coding Class in Leixlip](/best-coding-class-in-leixlip) - [Best Coding Class in Longford Town](/best-coding-class-in-longford) - [Best Coding Class in Laytown and Bettystown](/best-coding-class-in-laytown-bettystown) - [Best Coding Class in Malahide](/best-coding-class-in-malahide) - [Best Coding Class in Killarney](/best-coding-class-in-killarney) - [Best Coding Class in Sligo](/best-coding-class-in-sligo) - [Best Coding Class in Shannon, Co Clare](/best-coding-class-in-shannon) - [Best Coding Class in Rush](/best-coding-class-in-rush) - [Best Coding Classes in Nellore](/best-coding-class-in-nellore) - [Best Coding Classes in Rajahmundry](/best-coding-class-in-rajahmundry) ### Learn more - [Best Python Classes Online in the UK](/best-python-classes-online-uk) - [Coding Classes for Kids in the Netherlands](/coding-classes-for-kids-netherlands) - [Best Python Classes Online in Ireland](/best-python-classes-online-ireland) - [Best Coding Classes for Teens in the UK](/best-coding-classes-for-teens-uk) ### Free resources - [Python Tutorial for Beginners: Complete Guide](/resources/python) - [Objects and JSON](/resources/javascript/objects-in-javascript) - [Tuples in Python](/resources/python/tuples-in-python) - [Decorators and Iterators](/resources/python/decorators-and-iterators) ### From the blog - [Python OOP Tutorial: Classes, Objects, and Inheritance](/blog/python-oop-tutorial-for-beginners) - [Learn Python for Beginners: Complete Step-by-Step Guide (2026)](/blog/python-for-beginners) - [Python vs JavaScript: Which Should You Learn First?](/blog/python-vs-javascript-which-to-learn-first) ### Start here - [About Modern Age Coders, teaching since 2020](/about) - [Modern Age Coders pricing, one honest price per plan](/pricing) --- *Canonical: https://learn.modernagecoders.com/best-coding-class-in-letterkenny*