What is the difference between Go's defer, panic, and recover functions?

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Jayant Kumar · Accepted Answer

In Go, defer, panic, and recover are three functions that can be used for error handling and control flow in a program.
defer is a keyword in Go that is used to schedule a function call to be executed immediately before the function that contains the defer statement returns. The deferred function calls are executed in last-in-first-out (LIFO) order, meaning that the most recently deferred function is executed first. The main purpose of using defer is to ensure that certain cleanup tasks are executed even if an error occurs during the execution of a function.
panic is a built-in function in Go that is used to cause a run-time error that can be recovered by a recover function call. When a panic occurs, the program terminates immediately and starts unwinding the stack, executing deferred functions as it goes until it finds a recover call that can handle the panic. If there is no recover call, the program exits with a non-zero status.
recover is a built-in function in Go that is used to recover from a panic. It must be called inside a deferred function to be effective. When a panic occurs, the program starts unwinding the stack and executing deferred functions until it finds a recover call. If the recover function is called in the deferred function, the program continues execution as if nothing happened, and the value passed to the panic function is returned by recover.
In summary, defer is used for scheduling cleanup tasks, panic is used for generating run-time errors, and recover is used for recovering from a panic and resuming normal execution.

What is the difference between Go's defer, panic, and recover functions?

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What is the difference between Go's defer, panic, and recover functions?

Jayant Kumar @jayantkumar314

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