比較運算子

1. 假設 a=15 b=10

   pyuser@deyu ~/zzz$ python
   Python 3.12.9 (main, Aug 14 2025, 00:00:00) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)] on linux
   Type "help", "copyright", "credits" or "license" for more information.
   >>> a=15
   >>> b=10
   >>> a==b
   False
   >>> a!=b
   True
   >>> a<>b     ## python2 與 != 相同，python3 不適用。
     File "<stdin>", line 1
       a<>b
         ^
   SyntaxError: invalid syntax
   >>> a>b
   True
   >>> a>=b
   True
   >>> a<b
   False
   >>> a<=b
   False
   >>> quit()