Decisions · 8 minutes of curiosity

Two doors. One decision.

An if/else block chooses which instructions to run. When its condition is true, the first branch runs. Otherwise, the else branch runs. Only one branch is chosen each time.

Your mission: if / else

If keys is at least 3, say Door unlocked! Otherwise say Find more keys! Your program must work for both cases.

Not enough keys: Find more keys!Exactly enough keys: Door unlocked!Extra keys: Door unlocked!
▦ BLOCK LAB · made for making

Build it: choose a toolbox category, drag blocks onto the canvas, then snap instructions inside when I press Run. Drop values into matching sockets. Edit words or numbers directly on their blocks.

Waking up the blocks…

Projects are saved on this device when storage is available.

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Inputs Try different values

Inputs give your program information. An “input” block reads a value by its exact name. Task checks use their own values.

From blocks to Python A bridge to your next adventure

Generate real Python from these blocks. The helper functions keep Bit’s messages familiar. Python has its own type rules; the Python trail explains them.

Start a fresh plan?

This replaces the blocks on this canvas. Download your project first if you want to keep a copy.

A little hint, please

Use the ≥ comparison inside if. Put a say block in both the then and else sections.

How do I use these blocks?

Pick a category on the left to see its blocks. Drag a block onto the canvas. Instructions connect in a stack inside “when I press Run”. Rounded value blocks go into sockets. Change a field by selecting the word, number, or dropdown on the block.

Use the canvas zoom controls or Fit blocks if a stack goes out of view. Undo can bring back an accidental change. Disconnected blocks do not run. Your canvas saves here on this device.

Pack this idea for later: An if/else gives your program different paths for different situations. Explore it in Python →

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