Coding, Developer Tools & Technical Basics Used-For Guides

What Coding, Developer Tools & Technical Basics covers

This section covers programming languages and developer tools: HTML, CSS, JavaScript, Python, SQL, MySQL, GitHub and the technical vocabulary that surrounds building software.

Most people who land here are not developers. They are students, people considering a career change, small business owners talking to a contractor, or someone who has met a term at work and wants to know what it refers to. The guides are written for that reader — scope and purpose rather than syntax, so you can follow a conversation or decide whether something is worth learning.

The clearest thing to establish early is what the core web technologies each do, because they are constantly mentioned together and do quite different jobs. HTML is structure — the headings, paragraphs and links that make up a page. CSS is presentation — colour, spacing, layout, typography. JavaScript is behaviour — the things that respond when you interact. A page can exist with HTML alone. Add CSS and it looks designed. Add JavaScript and it does things.

GitHub confuses people for a different reason: it is not a language at all. It is a place to store code and track its history, and its real purpose is letting several people work on the same codebase without overwriting each other.

Browse individual used-for guides

A

• A For Loop used for
• An API used for
• API And used for
• API used for

C

• CSS And used for
• CSS Grid used for
• CSS Selectors used for
• CSS used for

D

• Def In Python used for

F

• Flask In Python used for

G

• Git Cherry Pick used for
• Github And used for
• Github Primarily used for
• Github used for
• Google Cloud Data Loss Prevention API used for
• Group By used for

H

• How Is Python used for
• Hr Tag In HTML used for
• HTML Tag used for
• HTML used for

I

• Is Javascript used for
• Is Python used for

J

• Java Be used for
• Java Code used for
• Java Language used for
• Java Programming Language used for
• Javascript And used for
• Javascript Be used for
• Javascript used for
• Joins used for

L

• Libraries used for

M

• Microsoft Graph API used for
• Microsoft Visual Studio used for
• Mysql used for

P

• Panda used for
• Pl SQL used for
• Pycharm Be used for
• Python Coding used for
• Python Language used for
• Python Oil used for
• Python Programming used for
• Python Scripting used for
• Python Software used for

R

• Rest API used for

T

• Tags used for
• The Hr Tag In HTML used for
• The Java Language used for
• The Percent Sign used for

V

• Visual Studio Code used for
• Visual Studio used for

W

• What Are Used For In Python used for
• What Can Github Be used for
• What Can Python Be used for
• What Exactly Is Python used for
• What Javascript used for
• Which Language used for
• Why Python used for

Most searched questions in this topic

• Github used for
• Javascript used for
• HTML used for
• CSS used for
• Github Primarily used for
• Mysql used for
• Python Programming used for
• Visual Studio Code used for

How the guides in this section differ

Language, database or service. These get discussed as if interchangeable. A language is what you write. A database stores data. A service such as GitHub hosts and tracks the result.

Front-end or back-end. Front-end is what runs in the browser: HTML, CSS, JavaScript. Back-end is what runs on the server, where languages such as Python and databases such as MySQL live.

Language or the thing built with it. SQL is a query language; MySQL is a database system you use it with. Java and JavaScript are unrelated despite the names, which is a genuinely common confusion.

Term	Kind of thing	What it is for
HTML	Markup language	Structure and content of a page
CSS	Style language	How the page looks
JavaScript	Programming language	How the page behaves
Python	Programming language	Automation, data, back-end, machine learning
SQL	Query language	Asking a database for data
MySQL	Database system	Storing structured data
GitHub	Hosted service	Storing code and tracking its history

If you are hiring or briefing a developer rather than writing code yourself, a few questions are worth asking regardless of the technology. Where will the code live, and will you have access to that repository? Who owns the code when the work is done? Where is the data stored, and does that arrangement meet your obligations under POPIA if it includes personal information?

None of these require technical knowledge to ask, and all of them are considerably easier to settle at the start than after a relationship ends. The most common avoidable problem in small-business software work is not bad code; it is a business that cannot get at its own repository, hosting account or domain when the developer moves on.

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Safety, accuracy and next-step checks

These guides explain what technologies are for. They are not tutorials and not a substitute for official documentation.

Points worth carrying:

• Never commit credentials to a repository. API keys, passwords and connection strings pushed to GitHub — including private repositories, and including in the history after deletion — are routinely scraped. Use environment variables and check before you commit.
• Public repositories are public. That includes the full commit history, not just the current state.
• Verify packages before installing them. Typosquatted package names on public registries are a known attack route. Check the name and the publisher.
• Keep dependencies updated. Most real-world compromises exploit known vulnerabilities in outdated libraries.
• Personal data in a database carries POPIA obligations, including for a small side project holding real people’s details.
• Free tiers change. Hosted database and platform free tiers are frequently revised. Do not build something you depend on without knowing the terms.
• Do not paste proprietary code into general AI tools without checking your employer’s policy and the tool’s terms.

Frequently asked questions

What is the difference between HTML, CSS and JavaScript? HTML is structure, CSS is appearance, JavaScript is behaviour. Together they make up almost every web page.

Is Java the same as JavaScript? No. They are unrelated languages with a confusingly similar name, for historical marketing reasons.

What is GitHub for? Storing code, tracking every change, and letting multiple people work on the same project without overwriting each other’s work.

Which language should I learn first? Python is commonly recommended for general programming and data work; HTML and CSS are the usual starting point for web pages. The better question is what you want to build.

What is the difference between SQL and MySQL? SQL is the language for querying databases. MySQL is a database system you query using it.