Introduction to Scratch programming

Scratch programming is generally designed for children who may create digital stories, games, and animations using the computer language Scratch, which has the largest kid-focused community in the world. Scratch was developed, maintained, and created by the nonprofit Scratch Foundation.

MIT created the event-driven visual programming language Scratch. In Scratch, we may use building blocks to make our interactive tales, games, and animations. On this platform, we may carry out activities without writing any code; everything is done by dragging and dropping, much like in visual basic. It is the best platform for learning programming fundamentals by creating appealing animation effects. Scratch has numerous features, such as video games, animations, tales, sound, events, etc. The Lifelong Kindergarten team from the MIT Media Lab created it as a free platform.

Any operating system is compatible because it was written in ActionScript and JavaScript. It is widely used worldwide and translated into over 70 languages. Scratch is designed to teach basic programming concepts while having fun. It's a tool for making fun games, stories, and another block-based programming. It comes with its paint editor and sound designer. Anyone can start learning programming from scratch without past knowledge of programming languages or principles.

Programming Palette

Programming Toolbox has every tool needed to make a sprite do or say something. The programming palette contains every program element, including loops. In Python, a variable is formed when assigned a value, unlike Scratch, where a variable must first be created.

Blocks

It includes puzzle-piece shapes for writing code in Scratch. These blocks are connected vertically, much like puzzle pieces. Every block has its shape, which helps to prevent syntax errors. When these blocks are joined, scripts are produced. Scratch supports the following six shapes: Hat, Stack, Boolean, Reporter, C, and Cap.

Stage Area

This is where everything happens, such as animations and turtle graphics in small and normal sizes, with a full-screen option also available. It uses X and Y coordinates to track action, with 0 being the stage center. All of the sprite activity happens here.

Sprites

These are the primary characters in the program. It is a graphic component made possible by a programming palette. The sprites are where all of the action happens. Users can default draw their sprites, and the sprite panel shows a cat avatar.

Script

Everything in the script specifies the type of action that sprites should take. It gives the characters advice on what to say or do. Each sprite is programmed using a script. Understanding the proper syntax is one aspect of utilizing a text-based language that many learners find challenging (the language rules).

Syntax errors are errors that occur in a program as a result of these rules not being followed. Thus, it is helpful to show how a learner's native language and the language they seek to acquire are similar and dissimilar. A few Scratch blocks are included here, along with their Python equivalents. The list is not exhaustive and is meant to be a resource rather than a checklist that needs to be completed.

How to write a program from scratch?

• Launch the Scratch editor, which is free of cost.
• Since every scratch program begins with a control block, drag the "when green flag clicked" or "when space key pushed" or "when sprite I click" block from the events blocks to the script.
• Add the "start sound meow" block from the sound block after the "when green flag clicked" block.
• This block is in charge of making a meowing sound.
• Under the "move 10 steps" block from the motion block, place the "start sound meow" block. Ten is replaced by one hundred.
• Once the script is complete, press the green flag execution button to start the program. Your cat will then move 100 steps while making a meow sound.

Advantages:

Scratch's interface is simple, making it easy for children and adults to understand. It enables students to develop 21st-century skills by utilizing technology. It is primarily intended for children. They might merely decide to learn a new programming language because it is cost-free.

Disadvantages

Scratch is public, so anyone online can access your work without your permission. Scratch makes it difficult for teachers to monitor the work that students generate.