```python filename = "example.txt" if filename.endswith(".txt"): print("文本文件") elif filename.endswith(".jpg") or filename.endswith(".png"): print("图片文件") else: print("其他文件") ``` 这个例子用于判断一个文件的后缀名,通过使用if elif语句和endswith()方法,判断文件后缀名是...
In the above example, the elif conditions are applied after the if condition. Python will evalute the if condition and if it evaluates to False then it will evalute the elif blocks and execute the elif block whose expression evaluates to True. If multiple elif conditions become True, then ...
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...
Our code doesn’t print the first message because it doesn’t match the if statement. Shorthand If When your if statement consists of a single line, you can also use the shorthand notation. Here is an example: This saves some space and could make your code easier to read. ...
Python3基础条件控制 if ---elif---else Python3 条件控制 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。 可以通过下图来简单了解条件语句的执行过程: if 语句 Python中if语句的一般形式如下所示: if condition_1: statement_block_1elif condition_2: statement_block_2else...
Similar to other programming languages, in Python, conditional situations can be handled using if command. In this tutorial, we’ve explained the following with examples: Basic Python if Command Example for Numbers Python if Command Operators Basic Pytho
输入变量 age 的值，再编写一个 if-elif-else 结构，根据 age的值判断处于人生的哪个阶段。 如果一个...
使用if-elif-else 结构虽然不如字典简洁,但使用 if-elif-else 结构也是一种实现 switch/case 功能的常见方法:python复制代码 def switch_case_example(value): if value == 1: return case_1() elif value == 2…
With predefined delimiters, we can just leave the code part and we should understand it implicitly. Doing the same results in an error in Python. For example, in the below code I have left the if conditional block without any implementation: ...
else statements. For some reason, my mind is not wrapping around this concept. I feel that elif statements are simply saying if statements without saying the else part, if that makes any sense. Would someone be kind enough to explain elif statements in more simple terms with an example ...