Arrays 2: Further Examples

Abstract

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

• To set an array size at run time—allocatable arrays .

• To introduce the idea of an array with more than one dimension and the corresponding control structure to permit easy manipulation of higher-dimensioned arrays.

• To introduce an extended form of the dimension attribute declaration, and the corresponding alternative form to the do statement , to manipulate the array in this new form.

• 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