JavaScript Data Types

In JavaScript, data types serve as the building blocks for variable assignments and manipulations within a program. These data types can be broadly categorized into two groups: primitive data types and object data types.

Primitive Data Types:

1. String:

   • The string data type is employed to represent textual information within the program.

   let name = "John";

2. Number:

   • The number data type encompasses both integers and floating-point numbers.

   let age = 25;
   let height = 1.75;

3. Boolean:

   • Booleans represent logical values, taking on either true or false.

   let isStudent = true;

4. Undefined:

   • The undefined data type represents variables that have been declared but not assigned any value.

   let city;

5. Null:

   • Null signifies the intentional absence of any object value.

   let result = null;

6. Symbol:

   • Symbols, introduced in ECMAScript 6, are unique and immutable primitive values.

   let id = Symbol("uniqueId");

Object Data Types:

1. Object:

   • Objects represent a collection of key-value pairs, allowing the grouping of related information.

   let person = { name: "Alice", age: 30 };

2. Array:

   • Arrays are ordered collections of values, enabling the storage and manipulation of multiple items.

   let numbers = [1, 2, 3, 4, 5];

3. Function:

   • Functions serve as reusable blocks of code, encapsulating specific logic for execution.

   function greet(name) {
     console.log("Hello, " + name + "!");
   }

4. Date:

   • The Date object is used for representing date and time values within the program.

   let today = new Date();

5. RegExp:

   • Regular expressions, represented by the RegExp object, enable pattern matching within strings.

   let pattern = /[a-z]+/;