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Chapter 3: Debugging · Level 17 of 30

Level 17: Turn in the Loop

Goal: The turn is in the wrong place. The robot should turn only once. ★★★ = 5 blocks or fewer.

▶ Watch how it works

Where a block sits matters. Here the turn is inside the loop.

Got it? Now solve your puzzle ↓ (a different board — work it out yourself!)

Speed

Blocks — tap or drag to add

Your program

💡 Need a hint?

Remove the “turn left” from inside the repeat, then tap “➕ add here” of the main program to add it after the loop.

What you learn here

Blocks inside a loop happen many times; blocks outside happen once. Where you put a block matters.

Chapter 3 — Debugging: Each level starts with a program that has a mistake. Run it, watch where it goes wrong, and fix it.

Blocks in this level

move forwardThe robot moves one square the way it is facing.
turn leftThe robot turns to its left on the same square.
repeatRuns the blocks inside it again and again — tap − and + to choose how many times.

Chapter 3 levels