However a smoother presentation could be produced by converting the number to a string, and then Appending this string and the description, as characters. In the following example n is a single number, while s , the formatted value of n , is a string of characters of length 2. Now we return to the subject of boxes. Although a box may contain a number, it is not itself a number. Flowing into the wide end we have data, and flowing out of the narrow end we have boxes which are scalars, that is, dimensionless or point-like.
Every array is either an array of numbers, or an array of characters, or an array of boxes.
This brings us to the end of Chapter 2. This material may be freely reproduced, provided that this copyright notice is also reproduced.