Here, we haven't used indentation after theifstatement. In this case, Python thinks ourifstatement is empty, which results in an error. Python if...else Statement Anifstatement can have an optionalelseclause. Theelsestatement executes if the condition in theifstatement evaluates toFalse. Syntax...
With Python 3.10, thematch-casestatement provides an alternative for certain conditional checks. This new feature is particularly useful when you have a series of conditions to check and want to avoid the nestedif/elsestatements. Thematch-casestatement is more concise and easier to read, making y...
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...
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...
if<test1>:<statement1>elif<test2>:<statement2>...else:<statement_else> 在这里,第一个if 与 为必要的,elif可以没有或添加多个,else 可以没有或只能有一个。 二、真值测试 在if语句里的位置里的就是判断语句。结果为True,就能进入子语句。判断语句包涵: • 比较运算符:==,!=,>,<,>=,<= • ...
代码中不可避免地会出现复杂的if-else条件逻辑,而简化这些条件表达式是一种提高代码可读性极为实用的技巧。 在Python 中,有多种方法可以避免复杂的 if-else 条件逻辑,使代码更加清晰和易于维护。 筑基期 提前return,去掉多余的 else 在Python 中,使用"提前返回"(early return)可以避免深层嵌套的if-else语句,并且...
statement_8 In the above case Python evaluates each expression (i.e. the condition) one by one and if a true condition is found the statement(s) block under that expression will be executed. If no true condition is found the statement(s) block under else will be executed. In the follow...
else写在一行 python 中的if python中if else语句一行,语句:statement 语句是由一些表达式组成的通常一条语句可以独立的执行来完成一部分事情并形成结果 一条语句建议写在一行内 多条语句写在一行内需要用(;)分开 示例:x=10
Here's an example of a nested "if" statement in Python: num = 5 if num > 0: if num % 2 == 0: print("The number is positive and even.") else: print("The number is positive and odd.") else: print("The number is negative.") ...
else: print("很可惜,你输了") 因为电脑的输入是随机产生的,所以可能产生不同的结果。 Python条件控制语句 Python中的条件控制语句 (Conditional control statement)是通过一条或者多条语句的执行结果(True 或者 False),来决定执行的代码逻辑 。 关键词:它包含if、elif、else关键字, Python 中是不存在else if的写...