Data types in Javascript.

JavaScript supports several data types, including:

Primitive data types:

• Numbers: used to represent numeric values, including integers and floating-point numbers.
• Strings: used to represent textual data. Strings are enclosed in single or double quotes.
• Booleans: used to represent logical values. A boolean value can be either true or false.
• Null: used to represent a null or empty value.
• Undefined: used to represent a variable that has not been assigned a value.
• Symbol (added in ECMAScript 6): used to create unique identifiers for object properties.

Object data type:

• Objects: used to represent complex data structures. Objects can contain properties and methods.

JavaScript is a dynamically typed language, which means that you don’t have to declare the data type of a variable before assigning a value to it. The data type of a variable is automatically determined based on the value assigned to it. For example, if you assign a number to a variable, the variable will automatically be of the number data type. Similarly, if you assign a string to a variable, the variable will automatically be of the string data type.

It’s important to understand the different data types in JavaScript, as well as how to work with them and convert between them, in order to write effective and efficient JavaScript code.