What is the difference between POST and PUT in HTTP?

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POST and PUT are two of the HTTP methods that are used to send data to a web server. The main difference between POST and PUT is in their intended usage and the way they handle data.

POST: The POST method is used to submit an entity to the specified resource, often causing a change in state or side effects on the server.

>>  In other words, when you use POST, you are sending new information to the server, which will typically create a new resource on the server side. 

>> This is the method used to submit form data, upload files, or create a new resource in a RESTful API.

PUT: The PUT method is used to update or replace an existing resource on the server. 

>> When you use PUT, you are sending data to the server to update an existing resource.

 >> If the resource does not exist, the server may create it. PUT can also be used to create a new resource if the server allows it, but it's not the most common usage.

In summary, POST is typically used to create a new resource, while PUT is used to update an existing resource.