diff --git a/haskell/01-expressions/README.md b/haskell/01-expressions/README.md
index c390fab..be76606 100644
--- a/haskell/01-expressions/README.md
+++ b/haskell/01-expressions/README.md
@@ -64,6 +64,12 @@ Expression | Type (:t) | Value | Comment
 
 ## Strings
 
+Expression | Type (:t) | Value | Comment 
+--- | --- | --- | -------- 
+`"hello" ++ " world"` | `String` | `"hello world"` | String concatenation
+`length "hello"` | `Int` | `5` | Length of the string
+`null ""` | `Bool` | `True` | Checks if the string is empty
+
 ## Control Structures
 
 ## Lists
\ No newline at end of file