Understanding var, let, and const in JavaScript: A game changer for learners

💻✨ Today’s JavaScript Practice Update ✨💻 Today, I explored and practiced JavaScript loops including for, while, and do...while. 🚀 It was an amazing experience learning how these loops simplify repetitive tasks and make code more efficient. 🔹 For Loop: Perfect for running a set of statements a fixed number of times. 🔹 While Loop: Ideal when the number of iterations isn’t known beforehand. 🔹 Do...While Loop: Ensures code runs at least once before checking the condition. Through hands-on coding, I understood how iteration plays a crucial role in automation, logic building, and performance optimization. This practice helped strengthen my problem-solving skills and boosted my confidence in writing clean, logical, and optimized JavaScript code. #JavaScript #Coding #LearningInPublic #WebDevelopment #ProgrammingJourney #ForLoop #WhileLoop #DoWhileLoop #FrontendDevelopment

Hello 𝗲𝘃𝗲𝗿𝘆𝗼𝗻𝗲! 👋, Ever wondered why your JavaScript code sometimes calculates things differently than you expected? The answer often lies in 𝗢𝗽𝗲𝗿𝗮𝘁𝗼𝗿 𝗣𝗿𝗲𝗰𝗲𝗱𝗲𝗻𝗰𝗲! It's the silent rule-maker of your expressions, and mastering it is crucial for writing reliable code. I've put a detailed article diving deep into how 𝗝𝗦 𝗱𝗲𝗰𝗶𝗱𝗲𝘀 𝘁𝗵𝗲 𝗼𝗿𝗱𝗲𝗿 𝗼𝗳 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻. From basic arithmetic to complex logical operations, understanding precedence will instantly level up your skills. I'm also proud to share that I wrote this article completely from scratch 𝗻𝗼 𝗔𝗜 𝗮𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝗰𝗲 𝗵𝗲𝗿𝗲! Just pure, hands-on learning and explanation. Ready to demystify JS expressions? Read the full piece here:  https://lnkd.in/gcBHaZey Take a look, let me know your thoughts, and drop a 𝗰𝗼𝗺𝗺𝗲𝗻𝘁 with any suggestions or 𝗼𝗽𝗶𝗻𝗶𝗼𝗻𝘀 on the article! I appreciate the feedback. #JavaScript #WebDev #Coding #Hashnode #OperatorPrecedence #JSFundamentals #Programming

Today’s JavaScript Learning Recap! I spent the day diving deep into some of the most powerful core concepts of JavaScript — and built multiple small examples to really understand how they work behind the scenes. Here’s what I explored and practiced today 1. Prototypes Learned that JavaScript is a prototype-based language. Every object has a hidden link to another object — its prototype — which it uses to inherit properties and methods. Used __proto__ manually to link objects and share functionality. 2. Classes Understood that a class is basically a blueprint to create multiple similar objects. Practiced creating methods like run(), jump(), and setBrand() inside a class. Learned that constructors help initialize object properties automatically when the object is created. 3. Inheritance & super() Built examples of dog extending elephant and carModel extending car. Understood how child classes can use parent properties and methods without rewriting code. Used the super() keyword to call parent constructors and methods from child classes. 4. Error Handling Practiced try...catch blocks to prevent code from breaking when an undefined variable is used. Understood how to gracefully handle unexpected runtime errors in JavaScript. Key takeaway: JavaScript’s power lies in its ability to build reusable, connected, and fault-tolerant code through objects, prototypes, and inheritance. Skills Practiced: JavaScript OOP | Prototypes | Classes & Constructors | Inheritance | Error Handling | super() #javascript #webdevelopment #oop #programming #developer #frontend #learningjourney #codingdaily #softwaredevelopment #html #css #javascriptdeveloper #learningbydoing #codepractice #inheritance #prototype #errorhandling #codingcommunity

🚀 My Takeaways After Learning Asynchronous JavaScript After spending some time diving deep into asynchronous JavaScript, here’s what I’ve come to realize 👇 💡 In modern JavaScript development, understanding async behavior isn’t optional anymore — it’s essential. 🧠 JavaScript runs on a single thread, and without async operations, our apps would freeze every time we wait for an API call or heavy data processing. ⚙️ That’s where callbacks, promises, and async/await come in — they keep our code responsive, efficient, and user-friendly. #JavaScript #Programming #WebDevelopment #FrontendDevelopment #CodingJourney #LearnToCode #SoftwareEngineering #DeveloperCommunity #100DaysOfCode A quick example 👇

Day 27 of learning JavaScript and things are finally making sense! 💡✨ Spent today figuring out DOM selectors 🎯. Honestly, I didn't realize there were so many ways to grab elements from a page 🤯, and they all return different stuff - NodeList, HTMLCollection, you name it. The tricky part? You can't just use them directly sometimes ⚠️. You gotta convert them first 🔄. Like querySelector vs querySelectorAll 🔍, or getElementById vs getElementsByClassName 📝 - they all work differently and give you back different types of data 📊. That's where Array.from() or the spread operator come in handy 🛠️ to convert these into something you can actually work with 💪. It's the little things like this that trip you up 😅 but also make everything click once you get it ⚡. JavaScript is way more powerful than I thought for making websites interactive 🌐✨. Just trying to stay consistent and learn something new every day 📚, even when my brain feels fried 🧠🔥. It's tough but rewarding! 🚀 #JavaScriptJourney #WebDev #CodingLife #100DaysOfCode #LearningInPublic #DeveloperCommunity #JavaScript #WebDevelopment #FrontendDevelopment #Programming #Coding #TechLearning #CodeNewbie #SelfTaught #DeveloperLife #TechCommunity #LearnToCode #WebDesign #HTML #CSS #DOM #DOMManipulation #ArrayMethods #JSLearning #CodingJourney

🚀Day 3 of My JavaScript Learning Journey Today I learned about something that looks simple but actually forms the backbone of how JavaScript handles variables — var, let, and const. Here’s what I understood 👇 🔹var → The old-school way. It’s function-scoped and can be redeclared or updated easily (sometimes too easily — which can cause bugs). 🔹let → The modern and safer option. It’s block-scoped and can be updated but not redeclared in the same scope. 🔹const → As the name says, it’s constant. Once assigned, its value cannot be changed or redeclared. Perfect for things that stay the same. 💡 My takeaway: Use let when the value might change, and const for everything else. Forget var — it belongs in history books now. 😅 Small concept, big impact. These little details are what make JavaScript more predictable and cleaner when we start writing real-world code. ➡️ The error in the image is because I have used the same name for variable in the code again. ➡️ I have used that name again by commenting the previous one. #JavaScript #WebDevelopment #LearningJourney #Frontend

As I continue learning JavaScript, I’m diving deeper into its core concepts. Today, I explored Hoisting, and it helped me understand how JavaScript handles code behind the scenes. What I learned about Hoisting: ~JavaScript moves variable and function declarations to the top of their scope before executing the code. This means: ~Functions can be called before they are declared ~Variables are initialized with undefined during the compilation phase ~Understanding execution context is crucial for clean and predictable code Why this concept is important? Hoisting may seem simple, but it forms the foundation of how JavaScript interprets code. It improves my understanding of: ~Execution phases ~Scope behavior ~Memory allocation ~Writing more structured and bug-free code My learning journey I’m currently focusing on strengthening my fundamentals concepts like: ~Hoisting ~Scope ~Closures ~Event loop ~DOM manipulation These basics are helping me build a strong foundation before moving toward frameworks and advanced topics. Every concept I learn brings me closer to writing cleaner, more efficient JavaScript. #JavaScript #LearningJourney #WebDevelopment #ProgrammingBasics #FrontendDeveloper

Day 29 of #100DaysOfCode – Deep Dive into JavaScript Operators & Hoisting Today’s session focused on understanding the wide range of JavaScript operators and how they function in real-world code. Key Learnings: Explored different types of operators: arithmetic, comparison, logical, assignment, ternary, type-checking, and string operators. Understood advanced concepts like spread/rest operators, nullish coalescing, and optional chaining. Learned about variable hoisting  how JavaScript handles variable declarations internally, and the differences in behavior between var, let, and const. Takeaway: A clear understanding of operator precedence and hoisting helps write cleaner, bug-free, and optimized JavaScript code. Grateful to Harsh Vandana Sharma from Sheryians Coding School for making today’s concepts practical and easy to grasp. #100DaysOfCode #JavaScript #WebDevelopment #CodingJourney #Frontend

🎯 Learning JavaScript Loops: While Loop Practice! Today, I practiced using while loops in JavaScript — one of the fundamental concepts in programming logic. Here’s what I built 👇 💡 Tasks I implemented: 1️⃣ Print numbers from 1 to 10 using a while loop. 2️⃣ Calculate the sum of numbers from 1 to 50. 3️⃣ Print numbers from 20 down to 1 in descending order. 4️⃣ Generate the multiplication table of 7 (from 1 × 7 to 10 × 7). 🧠 Each task helped me strengthen my understanding of loop conditions, increment/decrement operations, and logic flow in JavaScript. 🚀 Small steps like this make a big difference when learning to think like a developer. If you’re also learning JavaScript, try writing your own variations of these loops — it’s great practice! #JavaScript #WebDevelopment #CodingJourney #WhileLoop #LearnToCode #100DaysOfCode #FrontendDevelopment

Leveling Up on Day 2 of JavaScript! 📈 We dove headfirst into the essentials today, moving from the why to the how of writing clean JavaScript. A huge shoutout to Harsh Bhaiya for breaking down complex ideas into simple, actionable steps! What I Learned & Practiced: The Essentials: How to get started, why JS is important, and how to link it using the <script> tag. Variable Declarations: Establishing best practices with let and const for better scope management. Browser Toolkit: Mastering console.log for debugging and using prompt/alert for basic user communication. Data Handling: Practicing essential String methods (slice, split, replace, includes)—these are critical for manipulating data from APIs or user inputs! The momentum is real! Excited to keep building on this strong base. #Day2 #JavaScript #JSFundamentals #WebDevelopment #CodingJourney #HarshBhaiya Sheryians Coding School Sheryians Coding School Community