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I'm learning Python and came across a concept that has me confused. I want to understand how the "else" statement works in Python's If-Else constructs. Specifically, I have the following code snippet:
我正在学习Python，突然发现了一个让我感到困惑的概念。我想了解“Else”语句在Python的If-Else构造中是如何工作的。具体地说，我有以下代码片段：
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退出a = 67
if a == 8:
print("a is equal to 8")
elif a < 54:
print("a is less than 54")
My questions are:
我的问题是：
Is the "else" statement optional in an If-Else construct in Python? What happens if both the "if" and "elif" conditions are false?
在Python的If-Else构造中，“Else”语句是可选的吗？如果“if”和“elif”条件都为假，会发生什么情况？
In the code snippet I provided, neither the "if" condition (a == 8) nor the "elif" condition (a < 54) is true. What will happen when I run this code? Will anything be printed, or will it just exit without any output?
在我提供的代码片段中，“if”条件(a==8)和“elif”条件(a<54)都不为真。当我运行此代码时会发生什么？是否会打印任何内容，或者只是退出而不输出任何内容？
I'd appreciate any clarification on these points as it will help me better understand Python's control flow. Thank you!
如果能澄清这些问题，我将不胜感激，因为这将帮助我更好地理解Python的控制流。谢谢!
How about simply executing the code and seeing what it does?
简单地执行代码并查看它的作用如何？
If both conditions are false, then neither print statement will execute.
如果两个条件都为false，则两个print语句都不会执行。
"Is the "else" statement optional in an If-Else construct in Python? What happens if both the "if" and "elif" conditions are false?" I don't understand how there is a question. What ordinarily happens, if no code runs? Nothing, right? So. If you considered all the possible code, and none of it should run, then... nothing runs, and nothing happens, right? "Will anything be printed, or will it just exit without any output?" Did you try it? If not, why not? If you did, what happened? When you see what happened, why does this not answer the question for you?
“在Python的If-Else构造中，”Else“语句是可选的吗？如果”If“和”Elif“条件都为False，会发生什么情况？”我不明白怎么会有问题。如果没有代码运行，通常会发生什么？什么都没有，对吧？所以。如果您考虑了所有可能的代码，并且没有一个代码应该运行，那么...什么都不会运行，什么都不会发生，对吗？是否会打印任何内容，或者只是退出而不输出任何内容？你试过了吗？若否，原因为何？如果是你干的，发生了什么？当你看到发生了什么，为什么这不能回答你的问题？
Note in a function, where "nothing happens" because no conditional branch was evaluated, there may be no explicit return, in which case the function will return None.
注在函数中，如果因为没有计算条件分支而“什么都没有发生”，则可能不会有显式返回，在这种情况下，函数将返回NONE。
Though consider that in expression form, the else is mandatory. E.g. if condition: variable = value vs. variable = value if condition else other_value
尽管在表达式形式中考虑到这一点，但是Else是强制性的。例如，IF条件：Variable=Value VS Variable=Value If Condition Else Other_Value
In any language "if" statements checks the condition and condition is true then only below statements i,e true block will execute otherwise it will got to next statements. in above code since both conditions are false nothing will be printed.
在任何语言中，“if”语句检查条件，并且条件为真，则只执行下面的语句i，e真块，否则它将转到下一条语句。在上面的代码中，由于这两个条件都为假，因此不会打印任何内容。
Got it bro.....
明白了，兄弟……
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