2026年1月25日日曜日

What is Scratch programming?

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Scratch is a free, visual programming language designed specifically to make coding accessible and engaging for beginners—primarily children ages 8 to 16, though it’s used by people of all ages.

Developed by the MIT Media Lab, Scratch replaces complex text-based syntax (like semicolons and brackets) with colorful, interlocking blocks. Think of it as the "LEGO" of the programming world: if the blocks fit together, the code will run.


How It Works: The Visual Logic

Instead of typing lines of code, you drag and drop "blocks" of instructions into a script area. These blocks are categorized by function (Motion, Look, Sound, Logic, etc.) and are shaped so they only snap together in ways that make sense computationally. This effectively eliminates "syntax errors"—those annoying typos that crash traditional programs.

Core Components

  • Sprites: These are the "actors" of your project (like the famous Scratch Cat). You can give them instructions to move, talk, or change appearance.

  • The Stage: The background area where your sprites come to life.

  • Scripts: The sequences of blocks you stack together to tell a sprite what to do.

  • The Costumes & Sounds: Tools that allow you to customize how your sprites look and what they say or play.


Why Is Scratch So Popular?

Scratch isn't just about "learning to code"; it’s about computational thinking. It teaches the fundamental logic used by professional software engineers, such as:

  • Variables: Storing information (like a game score).

  • Loops: Repeating actions.

  • Conditionals: "If this happens, then do that" logic.

  • Event Handling: Making things happen when a key is pressed or a sprite is clicked.

Beyond the technical side, it hosts a massive online community where millions of users share, "remix," and collaborate on games, animations, and interactive stories.


Why Start with Scratch?

  1. Low Floor, High Ceiling: It’s easy to start (low floor), but you can create incredibly complex 3D engines or simulations if you put in the effort (high ceiling).

  2. Instant Feedback: You see the results of your code immediately on the stage.

  3. Creative Expression: It’s a tool for making art and stories just as much as it is for making games.

Fun Fact: Scratch is translated into 70+ languages and is used in almost every country in the world, making it a truly universal "first language" for the digital age.

Would you like me to walk you through the steps of creating your first simple "Move and Bounce" script in Scratch?

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