From 22a33e01325ba2331a6b28dfc3d466c119d0834c Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Thu, 3 Sep 2020 22:25:59 -0400
Subject: Add the null character literal @

---
 doc/syntax.md | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'doc/syntax.md')

diff --git a/doc/syntax.md b/doc/syntax.md
index 9c34bc2a..c74c3b2f 100644
--- a/doc/syntax.md
+++ b/doc/syntax.md
@@ -12,6 +12,7 @@ Glyph(s)        | Meaning
 ----------------|-----------
 `#`             | [Comment](#comments)
 `'"`            | [Character or string literal](#constants)
+`@`             | [Null character](#constants)
 `¯∞π`           | [Used in numeric literals](#constants)
 `()`            | Expression grouping
 `←`             | [Define](#assignment)
@@ -48,6 +49,8 @@ Strings are written with double quotes `""`, and characters with single quotes `
 
         ≡¨ ⟨ "a" ⋄ 'a' ⟩   # A string is an array but a character isn't
 
+The null character (code point 0) has a dedicated literal representation `@`. This character can be used to directly convert between characters and numeric code points, which among many other uses allows tricky characters to be entered by code point: for example, a non-breaking space is `@+160`. The character can also be entered as a character literal, but this will display differently in various editors and some tools may have trouble with a file directly containing a null, so it is best to use `@` instead.
+
 ## Expressions
 
 *[More discussion](context.md)*
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