Texting in Sapscript

Hi developers,

I'm modifying a Sapscript and I need to change the way a field &field_name& is displayed.

I've got to display a negative number. In that field the number is written with the sign on the right (for example like "15-") but i need to represent it with the sign on the left (like "-15").

Is there anything that allows me to do that immediately?

Thanks,

Simone