Python 3 - 嵌套 IF 语句

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  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。
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  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)
  

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  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")
  

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  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