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You can't just willy-nilly code an Operating System out of the blue w/ no coding experience. It's difficult simply because of how intricate it is. At bare minimum you'll need to know C and Assembly. You'll probably end up writing a 'diet' version of Linux if you have programming experience. Linux from Scratch would be your best bet (see here: http://www.linuxfromscratch.org/lfs/ )

but even then, you need to have experience w/ Linux. If you go this route, most of the primary components are written for you. Needless to say, even the simple route will be overwhelming for any beginner w/o programming experience. An OS is extremely intricate and too complex for a absolute beginner to mess around with. Security, memory management, file systems, etc aren't something you just magic into existence.

If you look on the web for simple os tutorials, you don't really get much out of them. You basically copy and paste and you're no better off than you were before. See here for example:
http://mikeos.berlios.de/write-your-own-os.html



If you're talking about making an app for iPhone, they're written in Objective-C, which is, surprise surprise, based on C. It's difficult if you don't know what you're doing, but if you learn, and take it all step by step, you'll eventually be on your way to making simple games and apps (then later maybe OSs). It's possible to write really good games/apps if you master a language and learn it in and out, but usually it's easier to work w/ a team. If you're curious about iPhone apps, Apple has a mildly useful intro on their site:

http://developer.apple.co...les/00_Introduction.html

For a recent example of what you can do alone, the extremely popular game "Minecraft" (coded in Java) was written by just one man. Sure, it doesn't look like the newest video games (which are written by teams of people), but it's extremely impressive that he did it by his onesy. Of course, he's also a seasoned game developer w/ years of experience.


If you're serious about learning programming, I'd start by learning C. It's the basis for a boat load of programming languages, including Java, C#, C++, Objective-C, Perl, etc. I'd recommend you pick up "Programming in C" by Stephen Kochan (or any of his books for that matter). I found it was better than K&R's (creators of C) book about the language. I also like "C Programming" by KN King. After C, Java's somewhat easy to learn, and very user-friendly ("Building Java Programs" by Reges is a great book). You'll be surprised what you can do easily w/ Java because of it's massive API and accessible GUI creation. Most other programming languages will also be easier to learn after C b/c you'll have a good foundation. There are also decent tutorials online for C, but I find myself referring to this one the most:

http://www.cprogramming.com/

If you're curious about Android programming, it's in Java. Java is an extremely versatile language and is great for any beginner. See here for coding Android apps:

http://www.makeuseof.com/...gle-android-application/


It will take a decent amount of time to learn a language, but a lot of time to master it. If you haven't gathered, I'm a CSC major. Programming is one of the most rewarding things you can do b/c it's all about your skill, and how you can creatively solve problems. Spend the time to learn and practice and it'll be worth it in the future.