Activity 12

Abstract

Activity 11 was about lists of numbers, and this activity takes the idea one dimension further. It deals with tables, two dimensional lists, sometimes known as arrays. Elements of an array have to be indexed by two numbers; the first of these identifies the row, and the second the column within that row, where the element is to be found. Thus L(2, 3) refers to the number held in the third column of the second row of the array called L. Type in and run the program shown in activity 12.1. When you have successfully run that, try the program with line 110 omitted, and note the effect this has on the way the output is displayed on the screen.