explain about step loop and table control.

Answer Posted / p.magana

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Step loops as structures in a screen do not have individual
names.
The screen can contain more than one step-loop, but if so,
you must
program the LOOP…ENDLOOPs in the flow logic accordingly. The
ordering of the LOOP…ENDLOOPs must exactly parallel the order
of the step loops in the screen. The ordering tells the
system which
loop processing to apply to which loop. Step loops in a
screen are
ordered primarily by screen row, and secondarily by screen
column.

Transaction TZ61 (development class SDWA) implements a step loop
version of the table you saw in transaction TZ60.

Static and Dynamic Step Loops

Step loops fall into two classes: static and dynamic. Static
step
loops have a fixed size that cannot be changed at runtime.
Dynamic
step loops are variable in size. If the user re-sizes the
window, the
system automatically increases or decreases the number of
step loop
blocks displayed. In any given screen, you can define any
number of
static step loops, but only a single dynamic one.

You specify the class for a step loop in the Screen Painter.
Each
loop in a screen has the attributes Looptype (fixed=static,
variable=dynamic) and Loopcount. If a loop is fixed, the
Loopcount
tells the number of loop-blocks displayed for the loop. This
number
can never change.

Programming with static and dynamic step loops is
essentially the
same. You can use both the LOOP and LOOP AT statements for both
types.

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