All language subtitles for 4. 3 Main Reasons for using constants [Must Know]

Welcome back and now I'm going to tell you a little bit about the main reasons for using constants,

because you may be wondering for yourselves as to why we even need them, right?

Because that's not quite understandable, just to say that they are constant and that's it.

OK, there are a lot of additional reasons and some of them I will cover up in this video.

So you may be you may be thinking to yourself that we've been doing pretty well also with just using

the variables, so why do we even need these constants for?

I will tell you some of the reasons, but maybe and don't worry so much about it, maybe at this point,

not all of them will seem to be like 100 percent clear to you.

And that's OK, because most of them, most of the reasons are considered to be for quite a higher level

programming courses.

But I think that's something you must be familiar with, at least in my course, to be familiar with,

not to implement everything regarding do, but at least to be familiar for these three main reasons.

So with that being said, let us start and discuss the main reasons to use constants and domain ideas

that I see for when and where you should consider using them.

All right, so reason number one for using constants use performance so the compiler can perform certain

optimizations for using loops as well as the usage of inline code.

OK, also creates an object code that is parallelism friendly.

That means simply if you are planning to develop complex applications and not just basic applications

like we've we've seen that can be made, especially at the beginning of the program, at the beginning

of the course.

So basically, if you're planning to develop complex apps, I mean, like really complex applications

with massive amount of, ah, commands and utilizing high CPU usage, a lot of commands, and basically

you may want to do it in a parallel manner, splitting the processing and so on, then using constants

will assist you with that.

So that's reason number one and I'll let us talk about reason number two, and this reason is called

defense.

So using constants allows basically allows you to protect yourself from accidentally changing values

when you are not supposed to.

So it gives you another layer of protection by basically when you have some functions, when you have

some program, when you when you know that some value should not be changed over time and during the

execution or during some function.

And you will specify these information that it's a constant and it should not get changed.

So that this way, even if you've done some mistake, even if you modified it by mistake, I don't know

or you forgot about it or something like that, then the compiler before the program will be built and

run, the compiler will notify you that, hey, listen, you tried to change here, these value of this

variable, but it's supposed to be constant.

So please check it out again.

OK, so that's another another layer of defense.

OK, another layer of protection to make sure that your values that are supposed to be constant are

not changed by mistake.

Okey dokey.

And finally, regarding the third reason, reason number three is code readability.

OK, so when reading the code and sometimes there are me maybe so many lines of code, it's a good practice

to use constants to specify the exact variables that, you know, they should not get changed.

So that gives you a good understanding for the fact that you are using a constant variable, since you

know that it's only defined here with its given value and it's not going to get modified during the

execution of the program.

And that's opposed, of course, to the standard variable that may change during any line of the program.

And you have like to take a closer look and see where and how it's being used.

So that's the third important reason that I wanted to tell you regarding the usage of constants in your

program, in your development process, or basically when your exams, of course, you may also let

me know if you find any additional.

Of course, there are additional reasons for using constants, but I think that I just took they are

most relevant in my opinion.

Of course, you may also add additional ideas, additional reasons for why you consider using pointer

are constants.

And yeah.

So as always, guys, thank you so much for watching.

Keep on practicing.

Keep on betting, getting better.

And actually you're bound to succeed if you do it correctly.

Hopefully so.

Thank you guys for watching.

My name is Vlad.

These are an important video.

And until the next time, until the next video or section or whatever it may be, have a great time.

I'll see you then.