https://www.w3school.com.cn/python/python_booleans.asp https://www.runoob.com/python3/python3-conditional-statements.html https://www.runoob.com/python/python-operators.html#ysf2 https://blog.csdn.net/liang19890820/article/details/105071471/...
在Python中，条件语句（Conditional Statements）又叫做判断语句，判断语句是由if、elif和else这三种语句组成的。其中，if是强制语句，可以独立使用，elif和else是可选语句，并且不能独立使用。判断语句配合布尔值，通过判断一条或多条语句的条件是否成立（成立为True，不成立为False），从而执行下一步动作，即True情况...
4.4 条件执行（conditionalexecution）条件语句（conditionalstatements）可以帮助检查条件并相应修改程序动作，如if语句：if之后的布尔表达式称之为条件（condition），若为true，则后面缩进的语句（如上print）会执行，否则不会有任何动作。if语句和函数定义有相同结构：header后有一个缩进的body。此类语句称之为复合语句（...
在Python中,True和False是内置的布尔类型常量,用于表示真和假的状态。 布尔运算符 在Python中,布尔类型常常与布尔运算符一起使用,来进行逻辑判断和条件控制。常见的布尔运算符有以下几种: and:逻辑与运算符,当所有条件都为真时返回真,否则返回假。 or:逻辑或运算符,当至少一个条件为真时返回真,否则返回假。 not...
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...
1.5.4 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...
在嵌套 if 语句中,可以把 if...elif...else 结构放在另外一个 if...elif...else 结构中。 if表达式1:语句 if表达式2:语句el if表达式3:语句else:语句el if表达式4:语句else:语句 实例 # !/usr/bin/python3num=int(input("输入一个数字:"))ifnum%2==0:ifnum%3==0:print("你输入的数字可以整除...
Python has simple and compound statements. A simple statement is a construct that occupies a single logical line, like an assignment statement. A compound statement is a construct that occupies multiple logical lines, such as a for loop or a conditional statement. An expression is a simple ...
These structures facilitate iteration, execution of a statement or block of statements repeatedly. Take the Quiz: Test your knowledge with our interactive “Python Conditional Statements” quiz. You’ll receive a score upon completion to help you track your learning progress: Interactive Quiz Python ...
So far, we have presented a Boolean option for conditional statements, with eachifstatement evaluating to either true or false. In many cases, we will want a program that evaluates more than two possible outcomes. For this, we will use anelse ifstatement, which is written in Python aselif...