Differnece between EXIT and LEAVE TO SCREEN or LEAVE PROGRAM?

Question

HI Experts,
Differnece between EXIT and LEAVE TO SCREEN or LEAVE PROGRAM?
thanks in advance

Answer 1

Syntax
EXIT.
Effect
If the EXIT statement is executed outside of a loop, it will immediately terminate the current processing block.
After the prodessing block has been executed, the runtime environment behaves in such a way that it follows with the exception Reporting Event Blocks START-OF-SELECTION and GET the schema from Leave Processing Blocks.
After the Reporting Processing Blocks START-OF-SELECTION and GET have been exited using EXIT, the runtime environment does not trigger any further reporting events. Instead, it directly calls the list processor for displaying the basic list.
Note
We recommend using EXIT only within loops (see EXIT (loops) ). Instead, use RETURN to leave processing blocks.
LEAVE [TO] SCREEN
Syntax
LEAVE { SCREEN | {TO SCREEN dynnr} }.
Variants:
1. LEAVE SCREEN.
2. LEAVE TO SCREEN dynnr.
Effect
This statement ends the processing of the current screen. The current processing block of the ABAP program and the current processing block of the dynpro are left immediately.
Variant 1
LEAVE SCREEN.
Effect
The variant LEAVE SCREEN calls the current next screen. This is either statically specified in the properties of the current screen or has been set before using the statement SET SCREEN.
Variant 2
LEAVE TO SCREEN dynnr.
Effect
The variant LEAVE TO SCREEN calls the screen with the number dynnr as the next screen. A data object of the type n of the length 4 is expected for dynnr. It must contain either the screen number of a screen in the main program of the current program group or the value 0. Otherwise, an exception that cannot be handled is raised. This statement is a short form of the statements SET SCREEN dynnr and LEAVE SCREEN.
Note
This statement does not terminate the entire dynpro sequence; it branches to an additional screen in the same sequence. Only if the number 0 is used to branch to the next screen, LEAVE SCREEN terminates the screen sequence.
LEAVE PROGRAM
Syntax
LEAVE PROGRAM.
Effect
This statement immediately ends the current main program and deletes its internal session - including all loaded programs, instances, and their data .
The LEAVE PROGRAM statement can appear anywhere within any processing blocks. It ends the program regardless of the program/object or the program group of the internal session in which it is executed.
Regards,
Pavan P.