[ENHANCEMENT] Use and instead of bitwise and

and is faster

snippets/factorial.md

@@ -12,7 +12,7 @@ Throws an exception if `num` is a negative or a floating point number.
 
 ```py
 def factorial(num):
-  if not ((num >= 0) & (num % 1 == 0)):
+  if not ((num >= 0) and (num % 1 == 0)):
     raise Exception(
       f"Number( {num} ) can't be floating point or negative ")
   return 1 if num == 0 else num * factorial(num - 1)