What is difference between defer and async ?

Question

Accepted Answer

Defer is used to delay the execution of a function until the surrounding function returns, while async is used to perform asynchronous operations.

Defer is a keyword in Go programming language used to delay the execution of a function until the surrounding function returns.
Async is a keyword used in JavaScript to perform asynchronous operations, allowing other code to run while waiting for the async operation to complete.
Defer is typically used for cleanup actions or closing resources, while async is used for non-blocking operations.
Example: defer fmt.Println("Deferred function") in Go, async function fetchData() { await fetch('https://api.example.com/data') } in JavaScript.