JSON Tutorial

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language.

JSON Syntax

{
    "name": "John Doe",
    "age": 30,
    "isStudent": false,
    "address": {
        "street": "123 Main St",
        "city": "New York"
    },
    "hobbies": ["reading", "gaming", "coding"]
}

• Data is in name/value pairs
• Data is separated by commas
• Curly braces hold objects
• Square brackets hold arrays

JSON Data Types

"name": "John Doe"

"age": 30

"isStudent": false

"hobbies": ["reading", "gaming"]

JSON Best Practices

• Use meaningful key names
• Keep the structure consistent
• Validate your JSON data
• Use proper indentation for readability
• Handle special characters properly

Common JSON Operations

const jsonString = '{"name":"John"}';
const obj = JSON.parse(jsonString);
console.log(obj.name); // Output: John

const obj = {name: "John"};
const jsonString = JSON.stringify(obj);
console.log(jsonString); // Output: {"name":"John"}