The f means that that literal number is a float. It's redundant, as the decimal point in the number makes it a float anyway. You can simply used "radians(29.9);" instead of "radians(29.9f);".

Try running the following code to illustrate this point:

" It's redundant, as the decimal point in the number makes it a float anyway"
True, but only in Processing, which makes all literal floating-point numbers to be floats. Java makes them double... This confuses people going from Processing to Eclipse.
And that's also why in general Java programming you will see these 29.9f, to make them explicitly float instead of double.

Oh okay. Great. Thank you!

McK