Most of the text in this book is set in a proportional font. This means that individual characters take up varying amounts of space horizontally, depending on the size of the individual character. For example, the letter M takes up more space than the letter I, so a string of Ms occupies more space than a string of Is. As a demonstration, let’s take a look at 10 of each character to see the difference:
Most Web pages that we’re accustomed to viewing use proportional fonts; they are attractive, professional-looking, and easier to read.
In contrast, a monospace font is one whose characters occupy exactly the same amount of horizontal space, regardless of the actual size and shape of the individual ...