Add a description, image, and links to the block-coding topic page so that developers can more easily learn about it ...

To manually format a code block in Google Docs without add-ons, select the text you want to turn into a code block, choose a monospace font such as ‘Courier New’ from the font dropdown, set ...

But pressing the big “play” button runs the code compiled by the blocks. It opens two little portholes on the top of the block, which the iPad camera recognizes as an input command.