Python 3 - 嵌套 IF 语句

简述

可能存在一种情况，当您想要在一个条件解析为真后检查另一个条件。在这种情况下，您可以使用嵌套if 构造。

在一个嵌套的if构造，你可以有一个if...elif...else在另一个内部构建if...elif...else构造。

句法

嵌套的 if...elif...else 构造的语法可能是 -


if expression1:
   statement(s)
   if expression2:
      statement(s)
   elif expression3:
      statement(s)
   else
      statement(s)
elif expression4:
   statement(s)
else:
   statement(s)

例子


# !/usr/bin/python3
num = int(input("enter number"))
if num%2 == 0:
   if num%3 == 0:
      print ("Divisible by 3 and 2")
   else:
      print ("divisible by 2 not divisible by 3")
else:
   if num%3 == 0:
      print ("divisible by 3 not divisible by 2")
   else:
      print  ("not Divisible by 2 not divisible by 3")

输出

执行上述代码时，会产生以下结果 -


enter number8
divisible by 2 not divisible by 3
enter number15
divisible by 3 not divisible by 2
enter number12
Divisible by 3 and 2
enter number5
not Divisible by 2 not divisible by 3