All of the examples so far in the book have been generated by hand. In practice, as you'll learn throughout this book, SVG is often generated by software. Most of this book will look at creating and manipulating SVG using web-based tools and libraries, but SVG images can also be generated by desktop drawing applications. While working on the web, you will often work with SVG images that have been created by designers in applications, such as Inkscape (https://inkscape.org/en/), Adobe Illustrator (https://www.adobe.com/products/illustrator.html), or Sketch (https://www.sketchapp.com/). These applications are wonderful because they allow non-technical designers to work with SVG to create images using advanced drawing tools.
While it's not a requirement for the rest of this book, I would suggest getting your hands on something you can use to author SVG...
