The primary change made to the NSLog statement is the inclusion of a field width speci fication. The characters %2i tell the NSLog routine not only that you want to display the value of an integer at that particular point, but also that the size of the integer to be displayed should take up at least two columns in the display. Any integer that would normally take up less than
two columns (that is, the integers 0 through 9) will be displayed with a leading space. This is known as right justification.