JavaScript Operators: A Guide to Arithmetic, Comparison, and Logical Operators

🚦 𝐋𝐞𝐭’𝐬 𝐚𝐝𝐝 𝐬𝐨𝐦𝐞 𝐥𝐨𝐠𝐢𝐜 𝐭𝐨 𝐭𝐡𝐚𝐭 𝐜𝐨𝐝𝐞! I’m excited to share the 3rd blog of my "JavaScript Essentials 101" series. After covering variables, data types and operators, it's time to learn how to guide your code through different paths. This time, we are diving deep into 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐅𝐥𝐨𝐰: 𝐈𝐟, 𝐄𝐥𝐬𝐞, 𝐚𝐧𝐝 𝐒𝐰𝐢𝐭𝐜𝐡. In my blog post, I breakdown exactly how JavaScript processes logic, using beginner-friendly examples that actually make sense. 𝐇𝐞𝐫𝐞 𝐢𝐬 𝐰𝐡𝐚𝐭 𝐰𝐞 𝐜𝐨𝐯𝐞𝐫: ✅ 𝐓𝐡𝐞 "𝐓𝐫𝐚𝐟𝐟𝐢𝐜 𝐑𝐮𝐥𝐞𝐬" 𝐨𝐟 𝐂𝐨𝐝𝐞: A simplified definition of what control flow actually means. ✅ 𝐈𝐟, 𝐄𝐥𝐬𝐞, 𝐚𝐧𝐝 𝐭𝐡𝐞 𝐋𝐚𝐝𝐝𝐞𝐫: Master foundational decision-making (using conditions like checking voting age or grading marks). ✅ 𝐓𝐡𝐞 𝐒𝐰𝐢𝐭𝐜𝐡 𝐒𝐭𝐚𝐭𝐞𝐦𝐞𝐧𝐭: How to use multi-way branching for cleaner, more readable alternatives to long else if chains. ✅ 𝐓𝐡𝐞 𝐁𝐫𝐞𝐚𝐤𝐢𝐧𝐠 𝐏𝐨𝐢𝐧𝐭: Why the break keyword is crucial inside switch. ✅ 𝐓𝐡𝐞 𝐆𝐨𝐥𝐝𝐞𝐧 𝐑𝐮𝐥𝐞: A practical breakdown of exactly when to use switch vs. if-else. Mastering these conditional structures is what transforms a simple "coder" into an "application builder." Stop letting your code run sequentially and start making it intelligent! 𝐑𝐞𝐚𝐝 𝐭𝐡𝐞 𝐟𝐮𝐥𝐥, 𝐝𝐞𝐭𝐚𝐢𝐥𝐞𝐝 𝐠𝐮𝐢𝐝𝐞 𝐡𝐞𝐫𝐞: https://lnkd.in/ghpw9iPc Mentions: Hitesh Choudhary Piyush Garg Chai Aur Code Akash Kadlag Jay Kadlag Suraj Kumar Jha Nikhil Rathore #JavaScript #CodingTips #WebDevelopment #LearnToCode #Programming #CodeLogic #Hashnode #ChaiAurCode #ChaiCode

𝗛𝗮𝘃𝗲 𝘆𝗼𝘂 𝗲𝘃𝗲𝗿 𝘀𝘁𝗼𝗽𝗽𝗲𝗱 𝗮𝗻𝗱 𝗮𝘀𝗸 𝘆𝗼𝘂𝗿𝘀𝗲𝗹𝗳 𝘄𝗵𝘆 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗶𝘀 𝗽𝗮𝘀𝘀 𝗯𝘆 𝘃𝗮𝗹𝘂𝗲, 𝗮𝗻𝗱 𝗻𝗼𝘁 𝗽𝗮𝘀𝘀 𝗯𝘆 𝗥𝗲𝗳𝗲𝗿𝗲𝗻𝗰𝗲?🤔 You see... when a value is passed into a function in JS, the function receives a copy of that value, not ❌direct access to the original variable. This means a function cannot reassign the caller’s variable or take ownership of it. For primitive values like (numbers, strings, booleans...), the copied value is independent, so changes inside the function do not affect the original value. (e.g reassigning) For objects and arrays(non-primitives), the copied value happens to be a reference (memory address) to the same object. So, mutating the object inside the function affects the original object but reassigning the reference does not! 🚫 so... JavaScript always passes values, but for objects, the value being passed is a reference ✅✅. If you understand this, it will surely save you from debugging headaches 🧑💻🧑💻 . . . . . #JavaScript #CodingTips #WebDevelopment #Programming #LearnToCode #CodeNewbie #SoftwareEngineering #DevTips #TechCommunity

Building on the basics of JavaScript, I’ve gained a solid understanding of how core components build a functional system. Writing code is the heart of this process, and seeing these concepts integrate is a major highlight of my learning. I have been practicing variable assignments using let, const, and var, while using typeof to identify different data types. I also learnt how to structure Control Flow through if/else statements, switch cases, and comparison operators. By using logical operators—specifically AND (&&) and OR (||)—along with strict equality (===), I can now set multiple rules for my code. I understand how to ensure that if a primary condition isn't met, the "else" logic applies correctly so the program follows a specific path. I also learnt how to use for loops combined with the .length property. This allows the code to automatically track the number of characters or items in a dataset. Instead of hard-coding values, I can now write dynamic code that adjusts to the data it receives. I am still working through the fundamentals, and I am excited to see how everything will work together once the foundation is complete! #JavaScript #WebDevelopment #CodingJourney #SoftwareEngineering #Techcrush #Frontend

🚀 LeetCode Problem Solved - Best Time to Buy and Sell Stock Today I solved the Best Time to Buy and Sell Stock problem on LeetCode using JavaScript with an optimized single-pass approach. 📊 Approach The goal is to determine the maximum profit from buying and selling a stock given its daily prices. The key idea is to: • Track the minimum price encountered so far • Calculate the potential profit for each day • Update the maximum profit whenever a higher profit is found This allows us to compute the result in one pass through the array. ⚡ Complexity 🔹 Time Complexity: O(n) – Traverse the prices array once 🔹 Space Complexity: O(1) – No extra data structures used ✅ Result ✔️ All test cases passed 📦 Constant space complexity Problems like this reinforce the importance of array traversal, state tracking, and optimizing brute-force solutions into efficient linear algorithms. Consistent practice with these problems strengthens DSA fundamentals and problem-solving skills for coding interviews. #leetcode #javascript #dsa #algorithms #codingpractice #softwareengineering #webdevelopment

Today I practiced the "Middle of the Linked List" problem while working on Data Structures in JavaScript. The challenge was to return the middle node of a singly linked list. If the list has two middle nodes, the second one should be returned. Instead of counting the length of the list first, I implemented the Fast and Slow Pointer technique: Slow pointer moves one step at a time Fast pointer moves two steps at a time When the fast pointer reaches the end, the slow pointer naturally lands at the middle of the list. This approach solves the problem in O(n) time and O(1) space, which is much more efficient than calculating the list length separately. Working through these problems is helping me strengthen my understanding of pointers, traversal patterns, and algorithmic thinking in JavaScript. #javascript #dsa #datastructures #algorithms #leetcode #programming #softwareengineering

𝗜𝗳 𝘆𝗼𝘂 𝗰𝗮𝗻’𝘁 𝘀𝗼𝗹𝘃𝗲 𝘁𝗵𝗲 “𝘁𝗵𝗶𝘀” 𝗽𝗿𝗼𝗯𝗹𝗲𝗺 𝗶𝗻 𝘁𝗵𝗲 𝗶𝗺𝗮𝗴𝗲… 𝘆𝗼𝘂 𝘀𝗵𝗼𝘂𝗹𝗱 𝗿𝗲𝗮𝗱 𝘁𝗵𝗶𝘀 𝗮𝗿𝘁𝗶𝗰𝗹𝗲. I recently went deep into one of the most confusing topics in JavaScript: this. At first it feels random… but once you understand the rules, it actually becomes predictable. Here’s what I explored while writing the article: • 𝗛𝗼𝘄 this 𝗶𝘀 𝗱𝗲𝘁𝗲𝗿𝗺𝗶𝗻𝗲𝗱 𝗯𝘆 𝘁𝗵𝗲 call-site rule • Why nested functions often break the expected this context • How arrow functions solve the nested this problem with lexical binding • When to use call() to explicitly set this • How apply() works • Why bind() is useful for permanently binding context The biggest realization for me: 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗱𝗼𝗲𝘀𝗻’𝘁 𝗰𝗮𝗿𝗲 𝘄𝗵𝗲𝗿𝗲 𝗮 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻 𝗶𝘀 𝘄𝗿𝗶𝘁𝘁𝗲𝗻. 𝗜𝘁 𝗼𝗻𝗹𝘆 𝗰𝗮𝗿𝗲𝘀 𝗵𝗼𝘄 𝗶𝘁’𝘀 𝗰𝗮𝗹𝗹𝗲𝗱. That one idea clears up a lot of confusion around this. If the image problem makes you pause for a second… the article will make it click. 💡 Article Link - https://lnkd.in/gRDMurrQ Also grateful to the amazing educators who simplify tough concepts: Hitesh Choudhary sir, Piyush Garg sir, and the Chai Aur Code team. #javascript #webdevelopment #learninpublic #frontenddevelopment #programming #codingjourney #devcommunity #chaicode

🔥 Master the art of coding loops in JavaScript! 🚀 Loops are a fundamental concept in programming that allow you to execute a block of code multiple times. They are essential for automating repetitive tasks and iterating over data structures. For developers, understanding loops is crucial for writing efficient and concise code. Whether you're working on data manipulation, user interfaces, or backend logic, loops help you process large amounts of data with ease. Here's a step-by-step breakdown: 1️⃣ Initialize a counter variable 2️⃣ Set the condition for the loop to continue 3️⃣ Execute the code block inside the loop 4️⃣ Update the counter variable at the end of each iteration Check out the code example below: ``` for (let i = 0; i < 5; i++) { console.log('Hello, loop ' + i); } ``` Pro Tip: Use caution with infinite loops! Always ensure your loop has a clear exit condition to avoid crashing your program. Common Mistake Alert: Forgetting to update the counter variable in a loop can lead to infinite loops. Always remember to increment or decrement the counter inside the loop. 🌟 Question for you: What creative project are you currently working on with loops in your code? Share below! 💡 🌐 View my full portfolio and more dev resources at tharindunipun.lk #JavaScript #CodingLoops #ProgrammingBasics #DevTips #LoopMastery #CodeNewbie #TechTalk #DeveloperCommunity #DigitalSkills

DAY 3 📌 LeetCode Problems Solved: Q1. Shortest Impossible Sequence of Rolls — Hard Q2. Number of Flowers in Full Bloom — Hard Q3. Minimum Number of Seconds to Make Mountain Height Zero — Medium Q4. Count Subarrays With Cost Less Than or Equal to K — Medium 📌 JavaScript Learning: Practiced writing more optimized JavaScript code, especially while working with forms. Learned how forms interact with the backend and how data flows between client and server. Built a Tic-Tac-Toe game to strengthen logic and DOM manipulation. Created a dynamic question generator to practice dynamic rendering and user interaction.

Sharing beginner-friendly notes on Advanced Functions in JavaScript 🧠 Covered two of the most important concepts every JS developer needs to master, Closures and Higher-Order Functions. The guide walks through how closures "remember" their lexical scope, enabling data privacy, memoization, and function factories. Also explored essential Higher-Order Functions like map, filter, reduce, and practical utilities like debounce, throttle, curry, and compose with clear examples and visual diagrams. A practical guide for understanding how functions truly work under the hood. Feedback and suggestions are welcome! #JavaScript #Coding #Learning #Programming

💡 JavaScript Array Methods Every Developer Should Know. Arrays are one of the most used data structures in JavaScript. Mastering array methods can make your code cleaner and more powerful. Important methods every developer should know: ✔️ map() – Transform each element ✔️ filter() – Select elements based on conditions ✔️ reduce() – Convert array to single value ✔️ find() – Get first matching element ✔️ some() / every() – Condition checks. Learning these methods improves problem solving and coding efficiency. #JavaScript #WebDevelopment #FrontendDeveloper #Coding