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JavaScript is often said to be untyped, but that’s not entirely accurate. While it is true that JavaScript allows you to assign different types of values to variables, it does have types. In fact, JavaScript provides both primitive types and object types. Let’s take a closer look at the different types in JavaScript: Primitive types JavaScript has several primitive types: Number: All numbers in JavaScript are internally represented as floats. String: A sequence of characters enclosed in quotes....

In JavaScript, both null and undefined are primitive types with different meanings. It is crucial to understand the distinctions between them. undefined: When a variable is declared but not assigned any value, it is considered undefined. For example: let age; // age is undefined It is important to note that attempting to access a variable that has not been declared will result in a ReferenceError: <variable> is not defined error, which is different from undefined....