JavaScript isNaN() vs Number.isNaN() Explained in Hindi | Why 'Hello' isNaN = true?

Aaj ki video mein hum JavaScript ke do confusing functions ke beech ka difference samjhenge: `isNaN()` aur `Number.isNaN()`. Kabhi aapne dekha hai ki `isNaN("Hello")` `true` de deta hai, lekin `Number.isNaN("Hello")` `false`? Ye sab "type coercion" ka khel hai! Is Video Mein Aap Seekhenge: 1. `isNaN()` pehle argument ko number mein convert karke check kyon karta hai. 2. `Number.isNaN()` literal `NaN` ko hi `true` kyon deta hai. 3. Real example jahan "Hello" par pehle `true` aa raha tha aur naya method `false` de raha hai. 4. Best practices aur tips, taaki aap easily NaN checks kar sako without confusion. **Sample Code**: console.log(isNaN("Hello")); // true (old behavior) console.log(Number.isNaN("Hello")); // false (new ES6 behavior) Agar aap JavaScript seekh rahe ho ya interview prep kar rahe ho, toh yeh concept aapko bohot madad karega. Video accha lage toh zaroor Like aur Share karein, aur channel ko Subscribe karna na bhoolein taaki hum milkar JavaScript ke har tricky concept ko decode kar sakein! Happy Coding! javascript,javascript tutorial,javascript tutorial for beginners in hindi,nan in javascript,javascript tutorial in hindi,what is nan in javascript,isnan method in javascript,isnan function in javascript,is not a number method in javascript,javascript isnan method in hindi,javascript for beginners,javascript isnan function in hindi,learn javascript,javascript tutorial for beginners,javascript for begineers in hindi