Answer
null: explicitly assigned to indicate no value.
undefined: declared but not assigned.
Quick Answer
null is an intentional absence of value — you explicitly set it. undefined means a variable was declared but not yet assigned, or a function returns nothing, or an object property doesn't exist. typeof null is "object" (a famous JS bug). typeof undefined is "undefined". Both are falsy.
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