There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in the text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Let's configure Zuul properties in our application using the application.yml configuration file."

A block of code is set as follows:

 @RestController
 class HelloController {
   @GetMapping("/")
   String hello() {
     "Hello World!!!"
   }
 } 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

  <dependencies>
     <dependency>               
       <groupId>org.springframework.boot</groupId>             
       <artifactId>spring-boot-starter-web</artifactId>    
     </dependency>
  </dependencies>

Any command-line input or output is written as follows:

$ Spring run HelloController.groovy

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Click the Generate Project button, and we have a ready-to-run application."