🤯 FIX 90% of JS Errors: Master Block Scope in 30 Secs! (Day 10)

Описание: Aapka JavaScript ka 90% error bas 30 second mein fix ho sakta hai! Welcome to Day 10 of our 100 Days Challenge! Today, we master the simple boundary that eliminates countless coding errors: Block Scope.

Understanding Block Scope is the secret to using 'let' and 'const' effectively and avoiding the bugs of 'var'.

➡️ Block: Any code inside curly braces { } (like if statements or loops).
➡️ Block Scope: 'let' and 'const' variables are locked to their block. They do not exist outside!
➡️ The 'var' Problem: 'var' ignores block boundaries, leading to unexpected variable overwrites (the source of most bugs).

Use 'let' and 'const' to lock variables tightly to their block and eliminate those 90% common errors!

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