Add last snippet

snippets/last.md

@@ -0,0 +1,17 @@
+---
+title: last
+tags: list,beginner
+---
+
+Returns the last element in a list.
+
+use `lst[-1]` to return the last element of the passed list.
+
+```py
+def last(lst):
+  return lst[-1]
+```
+
+```py
+last([1, 2, 3]) # 3
+```