1. if-else if condition_1: statement_block_1 elif condition_2: statement_block_2 else: statement_block_3 1. 2. 3. 4. 5. 6. 2. 循环 while 判断条件(condition): 执行语句(statements)…… for <variable> in <sequence>: <statements> else: <statements> # e.g. for i in range(5): ...
Code：计算机程序中使用的指令或语句。Statement：编程语言中的基本命令或指令。Expression：在代码中评估的...
主要包括：条件语句：if、elif、else循环语句：for、while循环控制语句：break、continue异常处理语句：try...
The while statement lets you repeat a statement until a specified expression becomes false. 2.2、do…while 循环:do { //Statements } while (Boolean_expression)。 do statement while ( expression ) ;(注意有一个分号) do … while循环类似于while循环,不同的是一个do … while循环是保证至少执行一次。
# This last statement is always executed, after the if statement is executed 输出 $ python if.py Enter an integer : 50 No, it is a little lower than that Done $ python if.py Enter an integer : 22 No, it is a little higher than that ...
A function usually communicates its results back to the calling program via the return statement, as we have just seen. To the calling program, it looks as if the function call had been replaced with the function's result, e.g.: >>> repeat(monty(), 3) 'Monty Python Monty Python Monty...
.__enter__() is called by the with statement to enter the runtime context. .__exit__() is called when the execution leaves the with code block. The as specifier is optional. If you provide a target_var with as, then the return value of calling .__enter__() on the context manag...
PyCharm 创建了一个 if 构造的存根,留给您填写适当的内容。 输入self.speed >= 5。 我们在代码中指定, brake 方法仅在 speed 大于或等于 5 时扣除 5: 低于5 的速度怎么办? 当您在现实生活中刹车一辆缓慢行驶的汽车时,它会直接停下。 让我们在代码中指定这一点。 在brake 方法的最后一行之后添加一行,并开...
Anytime you have need to repeat a block of code a fixed amount of times. If you do not know the number of times it must be repeated, use a “while loop” statement instead. For loop Python Syntax foritarator_variableinsequence_name:Statements...Statements ...
(1)内置模块一览表描述:模块是一个包含所有您定义的函数和变量的文件其后缀名为.py,模块可以被失败引入的以使用该模块中的函数等功能。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #>>>dir(random)#查看与使用模块里的函数,前提必须引入模块,高阶用法import引入模块as模块别名;#>>>help(random)#模块...