📚 docs: update README.md #4

README.md

@@ -126,7 +126,7 @@ A `fj` path is designed to be represented as a sequence of elements divided by a
 
 In addition to the `.` symbol, several other characters hold special significance, such as `|`, `#`, `@`, `\`, `*`, `!`, and `?`.
 
-## Access values
+## Access Values - Object
 
 - **Basic**: in most situations, you'll simply need to access values using the object name or array index.
 
@@ -153,3 +153,12 @@ In addition to the `.` symbol, several other characters hold special significanc
 ```shell
 > properties.alias\.description # "An unique identifier in a submission."
 ```
+
+## Access Values - Arrays
+
+The `#` symbol enables navigation within JSON arrays. To retrieve the length of an array, simply use the `#` on its own.
+
+```shell
+> animals.# # 3 (length of an array)
+> animals.#.name # ["Meowsy","Barky","Purrpaws"]
+```