diff --git a/bit.py b/bit.py
new file mode 100644
index 0000000000000000000000000000000000000000..91aad60fa38508c243d41feca03f1bf418d69347
--- /dev/null
+++ b/bit.py
@@ -0,0 +1,38 @@
+Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32
+Type "copyright", "credits" or "license()" for more information.
+>>> a&1
+Traceback (most recent call last):
+  File "<pyshell#0>", line 1, in <module>
+    a&1
+NameError: name 'a' is not defined
+>>> a=0b1100
+>>> a&1
+0
+>>> a&15
+12
+>>> 10&15
+10
+>>> 12&15
+12
+>>> a|15
+15
+>>> a|1
+13
+>>> a^1
+13
+>>> a^16
+28
+>>> a^15
+3
+>>> 0b1100 ^ 0b1111
+3
+>>> 0b1100 & 0b 1111
+SyntaxError: invalid token
+>>> 0b1100&0b1111
+12
+>>> a=255
+>>> ~a
+-256
+>>> #
+>>> #보수취하면 음수취하고 -1 해줌
+>>>