else 为可选语句,当需要在条件不成立时执行内容则可以执行相关语句。 具体例子如下: 例1:if 基本用法 flag = False name = 'lizexiong' if name == 'python': # 判断变量是否为 python flag = True # 条件成立时设置标志为真 print ('welcome lizexiong') # 并输出欢迎信息 else: print (name) # 条...
Python Nested if Statements It is possible to include anifstatement inside anotherifstatement. For example, number =5# outer if statementifnumber >=0:# inner if statementifnumber ==0:print('Number is 0')# inner else statementelse:print('Number is positive')# outer else statementelse:print(...
In this step-by-step course you’ll learn how to work with conditional (“if”) statements in Python. Master if-statements step-by-step and see how to write complex decision making code in your programs. Take the Quiz: Test your knowledge with our interactive “Python Conditional Statements...
for <variable> in <sequence>: <statements> languages = ["C", "C++", "Perl", "Python"...
Compared to if alone, if else provides a choice if the condition is not satisfied. The format of the Else statement is "else:". Continue the previous program, add else statements after the entire if statement, and output else programs when the age is not greater than or equal to 18.三...
python else if 多层 if语句流程图: if语句 if语句是最简单的决策语句。 它用于决定是否执行某个语句或语句块,即如果某个条件为真,则执行语句块,否则不执行. 语法: if condition: # Statements to execute if # condition is true 1. 在此,评估后的条件为真或假。 if语句接受布尔值–如果该值为true,则它...
2 else： if 表达式 3： 代码块 3 else： 代码块 4Python 中，if、if else ...
In Python, the if..else statement has two blocks: one for when the condition is True and another for when the condition is False. Syntax: if expression : statement_1 statement_2 ... else : statement_3 statement_4 ... If the expression is True, the statements after if are executed...
Python中的IF/ELIF/ELSE语句 我才刚开始学习python,就困在elif语句上了。我在这里和网上都看到了如何准确地使用它们,我似乎使用了正确的语法等等,但当我运行它时,它给了我第一个elif语句的语法错误。请参阅下面的代码: height = float(input("enter your height in m: "))...
else: print('数据输入有误') 由于python 并不支持 switch 语句,所以多个条件判断,只能用 elif 来实现,如果判断需要多个条件需同时判断时,可以使用or (或),表示两个条件有一个成立时判断条件成功;使用 and (与)时,表示只有两个条件同时成立的情况下,判断条件才成功。