PYthon 1day 笔记 条件语句

条件语句
    缩进用4个空格
    a.
     n1 = input('>>>')
     
     if "alex" == "alex":
      n2 = input('>>>')
      if n2 == "确认":
       print('alex SB')
      else:
       print('alex DB')
     else:
      print('error')
      
     
     注意：
      n1 = "alex"   赋值
      n1 == 'alex'  比较，
    b.
    
     if 条件1：
      pass
     elif 条件2:
      pass
     elif 条件3:
      pass
     else:
      pass
      
     print('end')
     
    c. 条件1
     and  or
     
     if n1 == "alex" or n2 == "alex!23":
      print('OK')
     else:
      print('OK')
      
    PS:
     pass 代指空代码，无意义，仅仅用于表示代码块