.. image:: /images/picR.png
:align: left
-.. raw:: latex
-
- \dropcap{r}
-
-efer to this appendix for a succinct but essentially complete summary of
-the Inform programming language; it covers everything that we've met in
+|R|\efer to this appendix for a succinct but essentially complete summary
+of the Inform programming language; it covers everything that we've met in
this guide, plus various constructs which didn't occur naturally, and
others of an advanced or obscure nature.
| `Constant {const_id}`;
| `Constant {const_id} = {expr}`;
-Standard constants are `true` (1), `false` (0) and `nothing` (0), also
-`NULL` (-1). Additionally, `WORDSIZE` is the number of bytes in a storage
-word: 2 for the Z-machine, 4 for Glulx.
+.. Generated by autoindex
+.. index::
+ pair: NULL; library constant
+ pair: false; library constant
+ pair: nothing; library constant
+ pair: true; library constant
+
+Standard constants are :const:`true` (1), :const:`false` (0) and
+:const:`nothing` (0), also :const:`NULL` (-1). Additionally, `WORDSIZE` is
+the number of bytes in a storage word: 2 for the Z-machine, 4 for Glulx.
To define a constant (unless it already exists):