{{ifempty|{{{AP|-}}}|-}}

{{ifempty|{{{AP|-}}}|-}}Why even have the ifempty tag? Why not condense it to just {{{AP|-}}}?

Because if you leave AP blank, but still have the parameter, it will show a blank rather than a dash. It's the same as {{#if:{{{AP|}}}|{{{AP}}}|-}}.

Ah, thanks for clearing that up. I'll probably be using this in the future then.

I should probably also mention that ifempty allows you to input up to 9 arguments before using the escape value.

So if I wanted to check for both AP and ap (caps and lower), I could use

{{ifempty|{{{AP|}}}|{{{ap|}}}|-}}