Basic JavaScript Question:

What is the difference between undefined value and null value?

Tweet Share WhatsApp

Answer:

(i) Undefined value cannot be explicitly stated that is there is no keyword called undefined whereas null value has keyword called null
(ii) typeof undefined variable or property returns undefined whereas typeof null value returns object

Download JavaScript PDF Read All 114 JavaScript Questions
Previous QuestionNext Question
What does undefined value mean in JavaScript? What is variable typing in JavaScript?