JavaScript Data Types

Let's check the Data Types in JavaScript - Two Categories of Data Types:

1. Primitive Data Types — These are immutable and cannot be modified after creation.

   a. String:

   let name = "JavaScript"; // typeof(name) — 'string'
   

   b. Number:

   let age = 18; // typeof(age) — number
   

   c. BigInt:

   console.log(9007199254740991n + 1n); // 9007199254740992n
   

   d. Boolean:

   let truth = false; // typeof(truth) — boolean
   

   e. null:

   let age = null; // null
   

   f. Undefined:

   let age; // undefined
   

   g. Symbol:

   let id = Symbol('id');
   

2. 
   

3. Non-Primitive Data Types — These are mutable and can be modified after creation.

   a. Object:

   var student = {
     firstName: "Hello",
     lastName: "World",
     age: 18,
     height: 170,
     fullName: function() {
       return this.firstName + " " + this.lastName;
     }
   };
   

   b. Array:

   var colors = ["red", "green", "blue"];
   

   c. Function:

   function greet(name) {
     return "Hello, " + name + "!";
   }
   

In addition to the primitive data types listed above, non-primitive data types include objects (like the 'student' example), arrays, and functions, which are mutable and can be modified after their initial creation. These non-primitive types provide flexibility in handling and manipulating data in more complex ways.