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In
this example, a segment of a process diagram is repeated until a
control condition is met. To implement this example, two routes
originate at the final activity of the repeated segment:
-
One route terminates at the first activity of the repeated
segment.
-
The other route terminates at the next activity after the
loop.
-
A condition on one of the routes is evaluated to determine
whether the segment is repeated.
The following illustration
shows a loop that contains two activities that are routed sequentially.
Loop counters
In some situations, the loop needs to be executed
a certain number of times. You can use a counter to keep track of
the number of times the loop needs to be executed:
-
The total number of loops to execute can be provided at run
time or at design time.
-
The number of loop iterations is stored in a variable (of
type
int
).
-
For each loop, the value of the variable is decremented by
using the
Set Value
service.
-
The value of the variable is used in the control condition
to see whether the loop should be executed again.
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