APIs and JSON are essential concepts in modern web development.
They allow different applications and systems to communicate with each other efficiently.<\/p>\n\n\n\n
If you use mobile apps, websites, or online services \u2014 APIs are working behind the scenes.<\/p>\n\n\n\n
API stands for Application Programming Interface<\/strong>.<\/p>\n\n\n\n An API is a set of rules that allows one application to communicate with another.<\/p>\n\n\n\n Think of an API like a waiter in a restaurant:<\/p>\n\n\n\n This usually happens using HTTP.<\/p>\n\n\n\n GET \u2192 Retrieve data Example:<\/p>\n\n\n\n GET \/users \u2192 Get list of users JSON stands for JavaScript Object Notation<\/strong>.<\/p>\n\n\n\n It is a lightweight data format used to send and receive data between client and server.<\/p>\n\n\n\n JSON is:<\/p>\n\n\n\n JSON structure uses:<\/p>\n\n\n\n This represents multiple objects.<\/p>\n\n\n\n When you call an API, it may return:<\/p>\n\n\n\n The frontend reads this JSON and displays the data.<\/p>\n\n\n\n They allow:<\/p>\n\n\n\n Mobile apps to communicate with servers For example:<\/p>\n\n\n\n REST (Representational State Transfer) is a common style for building APIs.<\/p>\n\n\n\n REST APIs:<\/p>\n\n\n\n Example:<\/p>\n\n\n\n GET \/products APIs allow applications to communicate with each other. Together, APIs and JSON form the foundation of modern web and mobile applications.<\/p>\n\n\n\n
How APIs Work<\/h2>\n\n\n\n
\n
Common HTTP Methods Used in APIs<\/h2>\n\n\n\n
POST \u2192 Send new data
PUT \u2192 Update existing data
DELETE \u2192 Remove data<\/p>\n\n\n\n
POST \/users \u2192 Create new user<\/p>\n\n\n\nWhat is JSON?<\/h2>\n\n\n\n
\n
Example of JSON Data<\/h2>\n\n\n\n
{
\"name\": \"Ali\",
\"age\": 25,
\"city\": \"Karachi\"
}<\/pre>\n\n\n\n\n
JSON Array Example<\/h2>\n\n\n\n
[
{
\"name\": \"Ali\",
\"age\": 25
},
{
\"name\": \"Sara\",
\"age\": 28
}
]<\/pre>\n\n\n\nAPI Response Example<\/h2>\n\n\n\n
{
\"status\": \"success\",
\"data\": {
\"id\": 1,
\"name\": \"Ayesha\",
\"email\": \"ayesha@example.com\"
}
}<\/pre>\n\n\n\nWhy APIs and JSON Are Important<\/h2>\n\n\n\n
Websites to fetch live data
Systems to integrate with other systems
Data exchange between different technologies<\/p>\n\n\n\n\n
What is a REST API?<\/h2>\n\n\n\n
\n
GET \/products\/1
POST \/products<\/p>\n\n\n\nKey Takeaway<\/h2>\n\n\n\n
JSON is the format used to exchange data in a simple and structured way.<\/p>\n\n\n\n