What This Set Is For

Times Table Poster and Checkerboard are both a loop inside a loop, and in both of them the interesting decision is what goes in the inner loop rather than how the loops are written. Star Rectangle is the plain case — every square is the same character, so there is no per-square decision at all. Meet the nested-loop mechanics here before the other two ask you to add a decision on top.

The review set is the one to pay attention to. Challenge Set 8 promised that Part 3's debug and pseudocode pages would arrive later in the part, once there was more than one kind of loop to get wrong. There now is, and they are here.

Both Are Briefs

Nobody lists the steps on either page. You get a result somebody wants, and you write the requirements list first — input, calculate, output, and every decision you had to make yourself.

If that is unfamiliar, read it once here: How to Read a Brief, in Challenge Set 1.

The Challenges

• Code Challenge: Star Rectangle
• Code Challenge: Times Table Poster
• Code Challenge: Checkerboard

Star Rectangle is one star and prints the same character in every square — the plain nested-loop mechanics, nothing else. Times Table Poster is Challenge Set 9's Times Table with a loop around it — if you did that one, start from it. Checkerboard is three stars because every square has to ask a question first, and the answer depends on both loop counters. A condition that looks at only one of them gives you stripes, and stripes look enough like a board to be worth checking twice.

These are options, not a checklist. Pick whichever combination gets you to what the dropbox asks for — Star Rectangle is the easiest way in if the per-square decision in the other two feels like too much at once.

The Question Set

Two pages this time, and they are their own homework drop. Neither one is about writing code.

• Debug Challenge: Loops
• Pseudocode Challenge: Robot on a Grid

All four programs on the debug page compile and run. Every one of them is wrong, and one of them never finishes — recognizing which, without running it, is part of the job.

The robot page is the only place this course teaches the robot block, and it is a recurring exam question type. There is no C# to translate from. Do it on paper, with a drawn grid.

Which Homework These Feed

The two review pages are one drop, due after this activity.

The other drop closes Part 3's pool for good. That pool is thirteen challenges across Challenge Set 8, Challenge Set 9, Challenge Set 10, and this one. Two were collected after Activity 1.19; three more are due now, which makes five of the thirteen.

The dropbox says how many. This page only says what is available.