What are Javascript datatypes ?

What is an Array objects ?

Examples of Javascript program.

JavaScript, a versatile and widely-used programming language, has various data types that are essential for different operations and functionalities in the language. Here’s an overview of its data types:

  • Number: In JavaScript, the Number data type represents both integer and floating-point numbers. It can handle a wide range of numeric values, including positive and negative integers and decimals.
  • String: The String data type is used for representing textual data. It consists of a series of characters and is enclosed in single quotes, double quotes, or backticks.
  • Boolean: This data type represents logical entities and can have only two values: true or false. Booleans are often used in conditional statements to determine the flow of program execution.
  • Undefined: When a variable is declared but not assigned a value, it automatically gets the value undefined. This data type signifies the absence of a meaningful value.
  • Null: Similar to undefined, null is a special data type that represents a “nothing” or “empty” value. It is often used intentionally to indicate the absence of any object value.
  • Object: JavaScript is an object-oriented language, and the Object data type is used for storing collections of data and more complex entities. Objects can be created using braces {}, and they store properties and methods.
  • Array: Although technically a type of object, arrays in JavaScript are used to store multiple values in a single variable. They are list-like objects and can hold values of different data types.
  • Symbol: Introduced in ECMAScript 6, the Symbol data type is used to create unique and immutable identifiers. Symbols are particularly useful when creating properties of an object that are not intended to be accessed or modified.
  • BigInt: This relatively new data type was introduced to handle integers larger than those the Number type can hold. BigInt allows the representation and manipulation of arbitrarily large integers.
  • Function: In JavaScript, functions are first-class objects, meaning they are treated as values and can be stored in variables, passed as arguments to other functions, or returned from other functions.

Understanding these data types is crucial for effective programming in JavaScript, as they form the foundation for manipulating data and creating complex logic in web development and beyond.