Arrays 2 Further Examples

Abstract

The aims of the chapter are to extend the concepts introduced in the previous chapter and in particular:

• to introduce the idea of an array with more than one dimension;

• to introduce the corresponding control structure to permit easy manipulation of higher dimensioned arrays;

• to introduce an extended form of the DIMENSION attribute declaration;

• to introduce the corresponding alternative form to the DO statement, to help manipulate the array in this new form;

• to introduce the concept of array element ordering;

• to introduce the DO loop as a mechanism for the control of repetition in general, not just for manipulating arrays;

• to formally define the block DO syntax.

Sir, In your otherwise beautiful poem (The Vision of Sin) there is a verse which reads Every moment dies a man, every moment one is born. Obviously this cannot be true and I suggest that in the next edition you have it read Every moment dies a man, every moment 1 1/16 is born. Even this value is slightly in error but should be sufficiently accurate for poetry.

Charles Babbage in a letter to Lord Tennyson.