diff --git a/pages/common/$.md b/pages/common/$.md
index 0bf05a5c90..380c406d82 100644
--- a/pages/common/$.md
+++ b/pages/common/$.md
@@ -22,3 +22,11 @@
 - Expand with the output of `command` and run it. Same as enclosing `command` in backtics:
 
 `$({{command}})`
+
+- List how many arguments the current context has:
+
+`echo $#`
+
+- Print out a Bash array:
+
+`echo ${array[@]}`