diff --git a/.zk/notebook.db b/.zk/notebook.db
index 7feddbf..f5813d8 100644
Binary files a/.zk/notebook.db and b/.zk/notebook.db differ
diff --git a/zk/Bitwise_operators.md b/zk/Bitwise_operators.md
index f73962b..6f27f06 100644
--- a/zk/Bitwise_operators.md
+++ b/zk/Bitwise_operators.md
@@ -11,4 +11,20 @@ In addition to mathematical, logical and comparison operators, there are
 _bitwise operators_. These operators execute conditions based on the actual bits
 of a value rather than the values that the bits are encoded to represent.
 
+Bitwise operators are typically represented with single characters of existing
+operators, e.g. `&` instead of `&&`:
+
+| Bitwise operation | Operator      |
+| ----------------- | ------------- |
+| AND               | `&`           |
+| OR                | (single pipe) |
+| NOT               | `~`           |
+
+An example of using the `&` operator:
+
+```py
+x =5
+y = 3
+```
+
 ## Related notes