Computer science in a nutshell?

"Eventually i want to make myself a computer and learn about the different parts of it"

If all you want to do is assemble a computer, you don't need any formal education for that. Just google search "how to build a computer" or youtube the same query. You will find results either way.

Is it a competitive/difficult field?

Yes, it is a difficult field. Programming (which isn't all of what computer science is about, but it's the part that actually requires critical thinking, not just memorizing what terms are) isn't for everyone.

Master Splinter says that Knowledge comes from wisdom, wisdom comes from mistakes. If you major in computer science, prepare to make a shitload of mistakes.

Depending on what school you go to (and I don't mean those crappy game development schools like devry, where they say you can learn to program "simulations" but don't require calculus or calculus based physics) then you''ll probably have to work on your math skills. A standard university (at least in CA) will force you to take and pass Calc 1,2, and discrete math. Sac State (which is a VERY good state school) will require one more semester of math (and you get a choice between number theory, differential equations, and whatever the hell applied linear algebra is). UC Davis will require you to take 3 semesters of calculus, Differential Equations, and whatever the hell their lower division linear algebra course is called, (if I remember correctly) PLUS discrete math.

Once you do the math, you do at least 2 semesters of calculus based physics, I've been in college for a while, and the consensus is that these are your hardest classes. Many schools will require you to take a third semester of a physical (math) based science course.

Before you ask, no, you will not use calculus for every day programming. But, it depends on what you are doing. If you are doing some type of gaming, then yes, you'll probably have to write your own definitions of the six trigonometric functions and (just a guess) you'll probably have to write them as an infinite series (or maybe this is a telescopic series..it's been a few years...I'm not entirely sure). to get the accuracy you need for games or "simulations". If you aren't doing scientific calculations, then you often have to refer to the 3 algorithm efficiency functions, Big-O, Big-Tetha, and Big-Omega to make sure what you are doing will work in the time you need to actually get it done.

P.S.: Is it more expensive to buy a computer from the market, or buy parts and make it yourself?

I don't know why you think this has anything to do with actual computer science, but the answer is it depends. Yes, you can go to Fry's Electronics and buy a computer, but then all the parts are covered by different warrenties and you'll probably be stuck shipping them back and forth between the manufacturer. Also, who do you think is going to get the better deal on motherboards, a guy buying just one, or dell...that buys hundreds of thousands of them.

If you want to learn to actually build computer components, then look into computer engineering. You'll cover alot of the programming stuff you will in CS, but it will be far more math intensive, and you'll probably get paid more.

EDIT:

Also, and don't forget, college is no guarantee of a job...watch the presidential debates on youtube and see how many people complain that they can't find jobs (even ones with at least BS degrees) because companies will **** over American's in a large chance to turn a profit with equally skilled people that will work for 1/5 the pay.

Look into grants because when you sign the student loans, you agree that you will pay them even if you can't find a job.

Science In A Nutshell

Computer science is a very difficult field, but it is also extremely easy to find a job compared to most professions. Developing software and computer construction are totally different fields. Computer science also is not so much about developing programs, but more about computational theory, which is very complicated and requires a strong background in math.

Hello, It would be great and good for you to make it yourself instead of buying a computer from the market. Buy a computer parts from the market and assemble it by yourself, it will be better it increase your knowledge of assemble it. Thanks :)

Computer science there are jobs increasing who are computer literete

i could say pc technological know-how makes a speciality of the internals of computers and theory, and so on. So it may be extra host based. that is extra encompassing, which includes networking, purposes, human beings, and so on.. pc technological know-how is a field of learn of computers.. I.T. how concepts is shared / saved / processed on computers.