Updated SC1066 (markdown)

SC1066.md

@@ -20,10 +20,19 @@ declare "$name=hello world"
 echo "$foo"
 ```
 
+Or if you actually wanted to compare the value, use a test expression:
+
+```sh
+if [ "$greeting" = "hello world" ]
+then
+  echo "Programmer, I presume?"
+fi
+```
+
 ### Rationale:
 
 Unlike Perl or PHP, `$` is not used when assigning to a variable.
 
 ### Exceptions
 
-None
+If you wanted to