cleaning up and organizing old problems (builtin)

src/bitwise/find_bit_len.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+''' Find how many bits a int has:
+    1) Start with a mask of 1
+    2) Mask with AND
+    3) if result (if true): count += 1
+    (obs: to find the int of a bin do int('1001', 2)) and to show in bin do bin(int))
+'''
+
+
+def find_bit_len(int_num):
+    lenght = 0
+    while int_num:
+        int_num >>= 1
+        lenght += 1
+    return lenght
+
+
+if __name__ == '__main__':
+    for i in range(17):
+        print(find_bit_len(i))
+        print i.bit_length()
+        print