Can you explain what is meant by a 'non-idempotent method' in programming?

In programming, a method is called non-idempotent if repeated calls with the same parameters can lead to different results or change the system's state each time.

For example, the HTTP method POST is usually non-idempotent because each request creates a new resource or modifies data, whereas GET is idempotent because it simply returns data without changes.

Example:

• Calling a non-idempotent method "create order" multiple times will result in creating multiple orders.
• Calling an idempotent method "update status" with the same value will not change the state after the first call.