Which visual programming environment uses blocks to build programs?

• A. Arduino
• B. Python
• C. Scratch
• D. Blockly

Answer: (D)

Block-based visual programming centers on building code by snapping together graphical blocks that represent commands. Blockly is a library that provides this exact approach, offering draggable blocks you combine to generate code in different languages. It’s designed to let developers create custom block-based editors and educational tools, which is why it’s the best fit for “uses blocks to build programs.” While Scratch also uses blocks, this item points to the tooling that enables block-based editors, which is Blockly. Arduino and Python rely on text-based programming and don’t center on building programs with blocks.