Answer
Function scope: Variables declared with var are accessible throughout the function.
Block scope: Variables declared with let or const are limited to the enclosing braces {}.
Block scope reduces bugs and prevents variable leakage.
Quick Answer
Function scope: variables declared with var are accessible anywhere within the containing function, regardless of the block (if, for) they're in. Block scope: variables declared with let or const are only accessible within the {} block they're in. Block scope prevents accidental variable reuse across if/for blocks and eliminates many var-related bugs.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ