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CLNull vs Undefined in JavaScript
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#Null Vs Undefined In Programming
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SYnull vs undefined in JavaScript – What’s the Difference?
(They both mean ‘nothing’… but not in the same way 👇)
If you’re learning JavaScript, these two probably confuse you:
null and undefined
Both represent “empty” or “no value”… but they’re not the same thing.
Let’s break them down in a way you’ll never forget 👇
🔍 1. What Is undefined?
A variable that is declared but not assigned any value becomes undefined.
let x;
console.log(x); // undefined
It also appears when:
A function doesn’t return anything.
You access a non-existent property.
✅ Who sets it? → JavaScript automatically assigns undefined.
🧱 2. What Is null?
null is a value that a developer manually assigns to a variable to indicate “no value” or “empty intentionally.”
let x = null;
console.log(x); // null
✅ Who sets it? → You, the programmer, assign null when you want to “reset” or intentionally mark a value as empty.
👉🏻 Tricky Comparison
null == undefined // true (loose equality)
null === undefined // false (strict equality)
So they’re loosely equal, but not strictly equal — because they are different types.
🧠 Real-Life Analogy:
undefined is like a blank form field — no one filled it yet.
null is like writing “N/A” — you chose to leave it empty on purpose.
Follow @syntax.error.ig for more
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CONull vs Undefined explained with Toilet Papers🧻
Share it with a Programmer Friend and let him learn some real sh*t
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THDifference between Null vs Undefined vs Not-defined in javascript
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COComparison between null and undefined.
The video show the comparison between null and undefined. Both has same meaning but works differently. This differ in quality makes javascript more interesting and weird.
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