比較運算子

1. 假設 a=15 b=10

   [dywang@deyu 10827000]$ python3
   Python 3.6.8 (default, Mar 19 2021, 05:13:41)
   [GCC 8.4.1 20200928 (Red Hat 8.4.1-1)] 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()