danryan.us

Start by looking at the syntax of the logic to make sure we understand it.

Step 1: do A
Step 2: do B
Step 3: If C, then while E do F and after that do G, otherwise do H
Step 4: do I

Do a first draft that treats step three as a black box.

Next, starting from the outside and working in, we draw the flow chart for "if C do something (the while stuff) otherwise do something else (H)":

And now, let's leave the "while loop" as a black box and fill in a few more details. It's now "if C do the while thing and then do G.

And finally, we'll insert the conditional diamond for the E of the while and a rectangle for the action F.

And then put it all together