# Number Study

Example 240

★This is the same case given above, but expanded just slightly to demonstrate that the names of the relations can also be printed, if we like:

"Number Study"

Abstraction is a room.

Parity relates a number (called N) to a number (called M) when N minus M is even.

Joint magnitude relates a number (called N) to a number (called M) when N plus M is greater than 7.

To chart (R - a relation of numbers):

repeat with N running from 1 to 5:

repeat with M running from 1 to 5:

if R relates N to M, say "[N] <=> [M] by [R][line break]";

When play begins:

let L be { parity relation, joint magnitude relation };

repeat with R running through L:

chart R.

As this shows, we can even form lists of relations. The kind of L is "list of relations of numbers".