Where does the k prefix for constants come from?

Question

it\'s a pretty common practice that constants are prefixed with k (e.g. k_pi). But what does the k mean?

Is it simply that c

Answer 1

I haven't seen it that much, but maybe it comes from certain languages' (the germanic ones in particular) spelling of the word constant - konstant.

Answer 2

K stands for konstant, a wordplay on constant. It relates to Coding Styles.

It's just a matter of preference, some people and projects use them which means they also embrace the Hungarian notation, many don't. That's not that important.

If you're unsure what a prefix or style might mean, always check if the project has a coding style reference and read that.