Guess the Output | JavaScript Interview Questions | Let Reassignment

VAR, LET and CONST are keywords in javascript. Can we reassign a new value to a variable declared by using LET keyword? This example shows that. It can be a javascript interview question. In it we also talk about a shorthand in it.

Consider

let a = 2;
let b = 4;
let c = a + b;
a;
value of 'a' here will be '2'.

But

let a = 2;
let b = 4;
let c = a += b;

In this case what will be value of 'a'?
its '6'.

This is because
a += b is a shorthand for a = a + b

Because we can reassign a value to a variable declared by using let keyword. A new value a+b was assigned to variable a, so the value of variable 'a' changed.

✅ How To Hide / Protect JavaScript Code - Techniques and Tools
✅ React JS UNDEFINED Solution | Reactjs Learning | Learn ReactJS & JavaScript Debugging Fast
✅ Calculate Sum or Total from Values in Array & Array Object | Learn JavaScript | Reduce Method
✅ Get URL Parameters in JavaScript | URLSearchParams
✅ DIV to PDF, Iframe to PDF using JavaScript Only (with CSS & Images Support)
✅ How To UnMinify JavaScript Minified Files Easily | Decrypt Complex JavaScript Code
✅ Toggle Class in Vanilla JavaScript | Learn JavaScript
✅ How to Execute a JavaScript File by using NPM
✅ Get User's Location (Country, State, City) with Free Unlimited API Access | PHP & JavaScript
✅ Replace jQuery with Vanilla JavaScript Code Easily | jQuery vs JavaScript
✅ Toggle in Vanilla JavaScript
✅ MINIFY JAVASCRIPT FILES & FOLDERS in Multiple Ways (Command Line & Code Editor)
✅ JavaScript vs jQuery | Difference between JavaScript and jQuery
✅ JavaScript Variable Redeclare & Reassign | VAR vs LET vs CONST | Practical Examples
✅ Display Data From JSON File in React
✅ Display Icons / Images from JSON File in React JS
✅ Fetch All Types of Data from JSON File in React JS
✅ 7 Ways to use Images in React JS
✅ Easy Way to use Images in React JS
✅ Require Image Not Working in React JS
✅ Multiple Images in One Import
✅ Multiple Sets of Images from One Import in React JS
✅ Default Map is not a Function in React JS
✅ Async Await Fetch in React JS
✅ Assigned a Value but Never Used
✅ Easily Sort Before Displaying Records in React JS
✅ Responsive Image Gallery from Scratch in React JS

Thank You!
👍 LIKE VIDEO
👊 SUBSCRIBE
🔔 PRESS BELL ICON
✍️ COMMENT

#shorts #js #javascript #let #WebStylePress #variable #programming #computerscience #interviewquestions