Python if语句 (Python if Statement) An if statement or an if block as it is commonly said, is useful to make decisions based on conditions in a program sometimes based on user input data. 如通常所说的if语句或if块,对于基于程序中的条件(有时基于用户输入数据)进行决策很有用。 An if block...
Python 流程控制 目录if语句if-else语句if-elif-else语句if多条件结构Python条件语句是通过一条或多条语句的执行结果(True或者False)来决定执行的代码块。if语句if...判断需要多个条件需同时判断时,可以使用or(或),表示两个条件有一个成立时判断条件成功;使用and(与)时,表示只有两个条件同时成立的情况下,判断条件...
student = input("请输入学生姓名") if student not in list1: print("不在该班级中") else: print("为此班级学生") 打印结果: 1. 2. 3. 4. 5. 6. 7. 8. "D:\Program Files\Python\Python37-32\python.exe" D:/demo/if_elif_else.py 请输入学生姓名二狗子 不在该班级中 1. 2. 3. if ...
您可以在一开始就将输入转换为int(不需要在每个if中都转换): age = int(input('What year where you born? ')) 将==符号替换为in。 elif age in range(1981, 2000): ... Python中有一个约定:变量名应以smaller-case字母开头。 如果执行了多个(和运算符)函数,请执行某些操作 ...
, 每一种判断条件对应一组业务代码 条件语句的说明 对于首次if判断不满足后 , 其他条件的判断语句 用法 if bool_result : do elif bool_result: elifdo # 当前elif语句对应的语法块 elif bool_result: elifdo # 缩进等级与do语法块一致 else: elsedo 参数 elifdo : 当前elif语句对应的python代码 ...
"D:\Program Files\Python\Python37-32\python.exe" D:/demo/if_elif_else.py 姓名:王二 年龄:19 if判断条件中,如果多个条件中只需要其中一个满足,则可用or 关联判断条件 #输入成绩在90分以上,或者成绩在60分以下的考生marks = {"张三": 95,"李四": 20,"王二": 88,"麻子": 91}fornameinmarks:ifmar...
if"王"in name and student[name] < 20:print("姓名:" + name+"" + "年龄:" + str(student[name]))else:pass 打印结果："D:\Program Files\Python\Python37-32\python.exe" D:/demo/if_elif_else.py 姓名:王⼆年龄:19 if判断条件中，如果多个条件中只需要其中⼀个满⾜，则可⽤or 关联...
What if you also want your program to run a piece of code when your test expression is False? Or what if you want to include another test expression? Python has other keywords you can use to make more complex if statements, else and elif. When you use if, else, and elif in ...
python3 3rd Oct 2021, 7:22 PM Aldrin S + 4 In addition to what Terel Scmitt said, can I point out another (unnecessary) thing. Since 0%2 and 0 are equal, and 0*2 is 0, the last statement is not needed. As well as this, since there are only odd and even numbers, the seco...
问我的elif函数不能正确使用EN首先简单介绍下 strpos 函数，strpos 函数是查找某个字符在字符串中的位置...