Where to find function documentation?

[zie]

Hi all. I just started to learn linux programing. When trying to debug a program, I always find some function from some library that I don't understand. Is there a good place in the internet to find references to these functions? BTW, if someone can tell me what kdDebug does (and how to use it), it would be great.

[gfreehed]

You could always try the man pages, just type in "man <function name>". You should get a description of any core c function. If you're using Java go view the API's at sun.java.com.