PROGRAMMING BASICS

ALGORITHIM — Thu, 24 Sep 2026 19:05:56 +0000

Master the Basics: The Ultimate JS Do’s and Don'ts for Beginners JavaScript is the engine of the modern web, turning static pages into interactive experiences. While learning the syntax is easy, becoming a good developer requires building the right habits from day one.Here is your compact guide to the essential rules of JavaScript development.
Code Structure & Variables DONOT use const by default and let only when you know a variable's value needs to change. This prevents accidental overwrites.DO use camelCase for naming variables and functions (e.g., userAge, calculateTotal).DON'T use var. It is outdated and creates scoping issues that lead to unpredictable bugs.DON'T use vague names like x, data, or temp. Name variables clearly based on what they hold (e.g., isLoggedIn instead of flag). Logic & ComparisonsDO use strict equality (===) to compare values. It checks both the value and the data type.DO keep functions small and focused on doing exactly one thing well.DON'T use loose equality (==). It allows hidden type conversions that cause hard-to-find errors (for example, 5 == "5" is true, but 5 === "5" is false).DON'T repeat your code. If you copy-paste the same logic twice, turn it into a reusable function instead.
Clean Coding PracticesDO comment on the Why, not the What. Good code explains what is happening; comments should explain why you chose a specific solution.DO embrace console.log() early to test your code and inspect variables as you build.DON'T over-comment. Avoid writing comments for obvious logic (e.g., // adding 1 to x).DON'T write massive blocks of code without testing. Write a few lines, run it, ensure it works, and repeat.

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PROGRAMMING BASICS