diff --git a/bash.md b/bash.md
index b1396ec73..62568dfe3 100644
--- a/bash.md
+++ b/bash.md
@@ -120,6 +120,8 @@ name="John"
 echo ${name}
 echo ${name/J/j}    #=> "john" (substitution)
 echo ${name:0:2}    #=> "jo" (slicing)
+echo ${name::2}     #=> "jo" (slicing)
+echo ${name::-1}    #=> "joh" (slicing)
 echo ${food:-Cake}  #=> $food or "Cake"
 ```