3.1 条件(判断)语句(Conditional Statements) 在Python中,条件语句又叫做判断语句,判断语句由if, elif以及else三种语句组成,其中if为强制语句,可以独立使用,elif和else为可选语句且不能独立使用。判断语句通过判断一条或多条语句的条件是否成立(True或者False),从而决定下一步的动作,如果判断条件成立(True),则执行if...
1. Conditional Statements: –If Statement: The “if” statement is used to execute a block of code if a certain condition is true. –If-else Statement: The “if-else” statement is used to execute a block of code if a condition is true, and another block of code if the condition is...
变量可以有不同的类型,比如布尔变量,字符串,浮点数等: 控制流,条件语句Control Flow: conditional statements if语句通过紧跟它的表达式的真伪来判断应该执行什么语句,比如: 如果2大于1,就打印 2 is greater than 1. 加else,相当于if后面的表达式不成立,我们就执行else,比如: 1肯定比2小,所以,我们会执行else后面...
By using thepassstatement in this program, you notice that the program runs exactly as it would if there were no conditional statements in the program. Thepassstatement tells the program to disregard that condition and continue to run the program as usual. Thepassstatement can create minimal cla...
python的教育课程 教学python,一、GettingStarted如果使用的是mac或linux系统,需要输入python3比如运行python3app.py可以直接在终端的>>>符号后执行python代码print("*"*10)1、实现在相关终端当运行“python”为CPython,这是python的默认实现Jython-javaIronPyt
Python Conditional Operators OperatorMeaningOperatorMeaning < Less than > Greater than == Equivalent != Not equivalent <= Less than or equivalent >= Greater than or equivalent If Statements We have seen these conditionals in action throughout this chapter, but they have been used ...
9️⃣ Conditional Statements in Python:条件语句是控制程序流程的关键,这里提供详细的语法和示例。 🔟 Looping in Python: For and While Loop:循环是编程中的核心概念,这里教你如何使用for和while循环。 1️⃣1️⃣ Working with Functions in Python:函数是组织代码的重要工具,这里教你如何创建和使用...
1.5.4 Conditional Statements Conditional statements: When executing a conditional statement, each clause is considered in order. The computational process of executing a conditional clause follows. 1)Evaluate the header's expression. 2)If it is a true value, execute the suite. Then, skip over all...
To address this problem, many debuggers also allow a conditional breakpoint, a breakpoint that will trigger only when a condition is true. For example, you might set a breakpoint in a for loop that’s triggered only if a variable is None to see why this case isn’t handled correctly....
# Define a variable and assign to it: var = "Hello, World!" 1. 2. 条件判断 # Conditional logic example (if / else statements) temperature = float(input("What is the temperature in Celsius? ")) if temperature > 30: print("It's hot today!") ...