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Getting Started with JavaScript

Data Types

JavaScript has several built-in data types that are used to represent different kinds of values. Some commonly used data types include:

  • Number: Used for numeric values, including integers and floating-point numbers.
  • String: Used for representing textual data, enclosed in single or double quotes.
  • Boolean: Represents a logical value, either true or false.
  • Undefined: A variable that has been declared but has not been assigned a value.
  • Null: The null data type represents the intentional absence of any object value. It is used to assign an empty or non-existent value to a variable.
  • Object: A collection of key-value pairs, enclosed in curly braces.


1let age = 25; // Number
2let name = 'John Doe'; // String
3let isStudent = true; // Boolean
4let numbers; // Undefined
5let strings = null; // Null
6let person = { name: 'John', age: 30, profession: 'Developer' }; // Object



Print the value "Doe" to the console.


Print the value 2 to the console.


Print the value true to the console.


Print the value 68.9 to the console.

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