What are JavaScript Data Types?

JavaScript, a widely used programming language, especially for web development, supports several data types. Here’s an overview of the key data types in JavaScript:

1. Number: This type represents both integer and floating-point numbers. Examples include 42, 14, etc.

2. String: Strings are sequences of characters used for text. They can be enclosed in single quotes (‘Hello’), double quotes (“Hello”), or backticks (`Hello`).

3. Boolean: This type has two values, true and false, and is often used in conditional statements.

4. Undefined: A variable that has not been assigned a value has the type undefined.

5. Null: This type represents the intentional absence of any object value and is represented by the keyword null.

6. Object: Objects in JavaScript are collections of properties. A property is an association between a name (or key) and a value. An object property’s value can be a function, in which case the property is known as a method.

7. Symbol: Introduced in ECMAScript 2015 (ES6), a symbol is a unique and immutable primitive value and may be used as the key of an Object property.

8. BigInt: Also introduced in recent versions of ECMAScript, BigInt is a numeric type that allows you to represent integers in arbitrary precision format. It’s useful for very large numbers.

JavaScript is a loosely typed or a dynamic language, meaning you don’t need to declare the data type of a variable beforehand. The language automatically determines the data types based on the value assigned to the variable. This flexibility allows for a more dynamic and versatile use of variables but also requires careful management to avoid unexpected behaviors or bugs.

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