Terminate program execution

Object references held by other programs are invalidated. If an End statement is encountered within a Try or Catch block, control does not pass to the corresponding Finally block. The Stop statement suspends execution, but unlike End , it does not close any files or clear any variables, unless it is encountered in a compiled executable. Because End terminates your application without attending to any resources that might be open, you should try to close down cleanly before using it.

For example, if your application has any forms open, you should close them before control reaches the End statement. You should use End sparingly, and only when you need to stop immediately.

The normal ways to terminate a procedure Return Statement and Exit Statement not only close down the procedure cleanly but also give the calling code the opportunity to close down cleanly. In the following example, the static objects sd1 and sd2 are created and initialized before entry to main.

After this program terminates using the return statement, first sd2 is destroyed and then sd1. The destructor for the ShowData class closes the files associated with these static objects. Another way to write this code is to declare the ShowData objects with block scope, allowing them to be destroyed when they go out of scope:. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. In this article, we will be having a look at some functions that can be considered as handy to perform this task — Exit a Python program.

The in-built quit function offered by the Python functions, can be used to exit a Python program. As soon as the system encounters the quit function, it terminates the execution of the program completely. The getenv function returns a pointer to environmental information associated with the string pointed to by name in the implementation-defined environmental information table.

The string returned must never be changed by the program. Return value when it gets successfully executed this function shall return a pointer to a string containing the value for the specified name. Now let's see the functions in signal management the C provides support for some signal management It is an integer type that can be accessed individually even when the interrupts that are asynchronous are still present.

They both help in defining strategies that help in signal handling.