Thread by @OzaKaran

Dfference between null and undefined?

In JavaScript, undefined means, the value of the variable is not yet defined. And typeof undefined is also.

#100DaysOfCode #javascript
#CodeNewbie #developers #programmer

undefined: Declaring a variable without assigning any value to it, store a function return value to a variable but the function does not return anything, return statement does not return any values, a function parameter does not passed and the global variable undefined.

null: null means empty or non-existent value which is used to indicate “no value”. Even though typeof null returns object, null is primitive type and not an object.