The Greeks and the integers
You should also be aware that writing good software to compute with inte gers is not restricted to programming procedures for doing arithmetic operations. Consider what happens when we multiply two integers. The usual method pro duces many intermediate numbers that are really not needed after the product has been obtained. Unless we spot and delete them, they’ll remain in the com puter, occupying precious memory space. If the numbers are large, the growing accumulation of such “rubbish” can quickly draw the system to a halt. Thus we must have a way of automatically finding and deleting unnecessary numbers.