Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about why you do not use else statements to write code, many people may not understand, in order to make you better understand, the editor summed up the following, I hope you can get something according to this article.

If... Else statements are one of the most common ways for many programmers to write code. You can even see that many programmers have countless else statements embedded in their code. But is this really good?

When I first came into contact with programming, I wish someone would share some pertinent life experience with me while I was groping to develop my first website.

The first big mistake I made at that time was to overuse the else keyword when writing conditions. It's not just me, but later I found that many developer friends have this problem, so I'm going to talk about it today.

In some cases, we may not be able to use such methods in our code. Sometimes, using the else keyword is really the best solution. I admit all this, and I just want to give you a little bit of new ideas about building logic.

Indent wave punch!

Guard sentence

According to Wikipedia, the Wei sentence is a prerequisite check for integrity. Used to avoid errors during execution.

I hope it doesn't seem like what people say, so I'll translate it in Putonghua. We first have to check the integrity of the prerequisites (at the beginning of the code) in order to avoid errors in the main logic flow.

In an ideal process (when verified correctly), we want the main logic of the program to start running after verification.

Now let's assume that we are running a website that contains an advanced buying area that is limited to paying customers after 12:00 every night.

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