Microcontrollers have limited resources and generally are not efficient for floating point or exponential operations. PBP is an integer basic that makes good use of limited devices. You can get integer exponential functions by repeated multiplication and with the new LONG variables on PBPL you can probably get reasonable results by scaling but you will need to devise the functions yourself.

Working with floating point (in Mikroelktronica or Proton+) or longs with PBPL will devour code space.

What are you doing that needs exponentials? There may be an alternative solution.

HTH
Brian