JSON

JSON Basics

Transcript

1. Introduction to JSON Data Representation and Exchange Formats Dr. Ranjitha M Department of Computer Science Kristu Jayanti University, Bengaluru, India
2. Overview • What is JSON? • History and Importance • Syntax and Structure • JSON Data Types • JSON vs XML • Parsing and Stringifying JSON • Applications and Examples
3. What is JSON? • JSON stands for JavaScript Object Notation. • Lightweight data-interchange format. • Easy for humans to read and write. • Easy for machines to parse and generate. • Commonly used for web APIs and configuration files.
4. Features of JSON • Text-based and language-independent. • Uses key-value pairs. • Supports nested structures. • Portable and easy to integrate. • Widely supported across programming languages.
5. JSON Syntax Rules • Data is in name/value pairs. • Data is separated by commas. • Curly braces hold objects. • Square brackets hold arrays. Example: { "name": "John", "age": 25, "skills": ["Python", "C", "Java"] }
6. JSON Data Types • String • Number • Object • Array • Boolean • Null
7. JSON vs XML JSON: • Simpler syntax. • Less verbose. • Data-oriented. • Faster to parse. XML: • Markup language. • More complex and verbose. • Supports attributes and namespaces.
8. Working with JSON in Python Example: import json # Convert Python dict to JSON x = {'name': 'Alice', 'age': 22} y = json.dumps(x) print(y) # Convert JSON to Python dict data = json.loads(y) print(data['name'])
9. Applications of JSON • Web APIs and RESTful Services • Data Storage and Configuration Files • IoT and Mobile Applications • Database Communication (MongoDB, Firebase) • Data Serialization in Machine Learning
10. Advantages of JSON • Lightweight and fast. • Easy to read and modify. • Widely supported in programming languages. • Ideal for data interchange between systems.
11. Summary  • JSON is a universal data format for exchanging information.  • Easy to use, read, and parse.  • Plays a key role in modern web and mobile development.
12. References • www.json.org • W3Schools JSON Tutorial • MDN Web Docs on JSON • Python Official Documentation (json module)