latex change heading text

I want to change the text for certain headings in sections of my latex document.

Specifically, I'm using the book document class, and I want to change the 'Chapter #' heading to some custom text... Once I've done it by tweaking the included files for latex and the book doc class, but I guess there's开发者_Python百科 a better solution... any ideas?

you can use

\renewcommand{\chaptername}{MyChapter}