ABAP – While Loop

                 A WHILE loop statement repeatedly executes a target statement as long as a given condition is true.
The general format for the WHILE command is as follows:

WHILE <logical expression>
<statement block>.
ENDWHILE.

The statement block may be a single statement or a block of statements.

The WHILE loop executes the statements enclosed by the WHILE and ENDWHILE commands until the logical expression becomes false.

Flow Diagram:-

            The WHILE command is preferable while considering the performance of programs. The loop continues until the logical statement is found to be untrue and exits the loop if a false statement is found, and the first statement after the WHILE loop is executed.

Example:-

REPORT YS_SEP_15.

DATA: a type i. a = 0. 

WHILE a <> 8. 

Write: / 'This is the line:', 

a. a = a + 1. 

ENDWHILE.

The above code produces the following output:

This is the line: 0

This is the line: 1

This is the line: 2

This is the line: 3

This is the line: 4

This is the line: 5

This is the line: 6

This is the line: 7