### posInteger

An expression that evaluates to a positive integer.

For example:

```
3
67 mod 13
the number of bg fields
the number of backgrounds
the number of cards div 2
```

See also: `[ph:background]`, `[ph:bkgnd]`, `[ph:button]`, `[ph:card]`, `[ph:chunk]`, `[ph:field]`, `[ph:menu]`, and `[ph:menuItem]`