>>>whileTrue:...number=int(input("Enter a positive number: "))...print(number)...ifnotnumber>0:...break...Enter a positive number: 11Enter a positive number: 44Enter a positive number: -1-1 Again, this loop takes the user input using the built-ininput()function. The input is ...
条件语句(Conditional Statements)条件语句允许程序根据条件的不同执行不同的代码段。这是实现决策逻辑、分支和循环的基础。 if 语句 if 语句是最基本的条件语句,它用于执行仅当特定条件为真时才需要执行的代码…
counter+= 1print("1 到 %d 之和为: %d"% (100, sum)) while 循环使用 else 语句 如果while 后面的条件语句为 false 时,则执行 else 的语句块。 while语法格式如下: while<expr>:<statement(s)>else: # expr 条件语句为false,则执行<additional_statement(s)><additional_statement(s)> expr 条件语句...
while conditional_expression:statement # body else: # optional statement # runs only the loop has ...
This kind of loop ensures that the body of the loop is executed at least once. It can be implemented using an infinite loop along with a conditional break at the end. This is similar to the do...while loop in C. Flowchart of Loop with Condition at Bottom ...
1. 条件语句(Conditional Statements) 2. 循环语句(Loop Statements) 使用`for` 循环: 使用`while` 循环: 3. 数据结构存储和组织数据 3.1. 列表(Lists) 3.2. 字典(Dictionaries) 3.3. 集合(Sets) 基础编程中,掌握条件语句、循环语句的使用是至关重要的。
break和continue在while循环和for循环中的代码执行过程如下: 循环else 循环后面可以加else语句,while...else,for...else。咋看一下else好像并没有什么用,因为while循环条件为False或for循环结束后,一定会执行接下来的语句。但是如果循环中出现了break,当循环从break跳出来后,是不会执行else语句的。例如: ...
4. 选择结构（Selection/Conditional Statements）：选择结构用于根据条件选择执行不同的代码块，Python 中常用的选择结构包括 if、elif 和 else。# 例子：简单的if-else语句num = 10if num > 0:print("Positive")else:print("Non-positive")5. 循环结构（Loop Statements）：循环结构用于重复执行一段代码，Python...
In the selection or loop structure, if the value of the conditional expression is not Falsea, 0, None, etc., it will all be regarded as True 1.关系运算符：可连用 1. Relational operators: can be used together 2.不允许使用赋值运算符= 2. The assignment operator = is not allowed 3. ...
However, you can use any Python object in a Boolean context, such as a conditional statement or a while loop. In Python, all objects have a specific truth value. So, you can use the logical operators with all types of operands. Python has well-established rules to determine the truth ...