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: "In Command Prompt, type hostname and press the Enter key."

A block of code is set as follows:

public class FoodClassifier : IFoodClassifier
{
                public FoodClassification Classify(Food food)
                {
                                // Unchanged classification algorithm
                } 
}
public class FoodClassifierToBeRemoved : IFoodClassifer
{
    public FoodClassification Classify(Food food)
                {
                                // Unchanged classification algorithm
                } 
}

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

[default]
exten => s,1,Dial(Zap/1|30)
exten => s,2,Voicemail(u100)
exten => s,102,Voicemail(b100)
exten => i,1,Voicemail(s0)

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

git lfs install
git lfs track "*.mp4"
git add .gitattributes

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."