Explain the difference between null and undefined in JavaScript.
Explain the difference between null and undefined in JavaScript.
Ask by Revati S Misra
Updated 17 Apr 2023
In JavaScript, null and undefined are both values that represent the absence of something, but they have different meanings.
undefined is a value that is assigned to a variable that has been declared but has not been assigned a value. It is also returned when accessing an object property that does not exist or when a function does not return a value.
null, on the other hand, is a value that is explicitly assigned to a variable to represent the absence of an object. It is often used to indicate that a variable should have no value