Conventions used

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

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "So, this is a very simple function, named serviceCharge()."

A block of code is set as follows:

class ClassName {
   property1
   property2 
   property3 
   method1() { 
      code
   }
   method2() {
      code
   }
} 

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

let cat = Animal()
cat.name = "Cat"
cat.sound = "Mew" 
cat.numberOfLegs = 4 
cat.breathesOxygen = true
print(cat.name)

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: "Launch Xcode and click Create a new Xcode project:"

Tips or Important Notes

appear like this.