Message box

[j]

> function somme a,b
> return a + b
> end somme

works here, also.  check for typing errors.  as someone else indicated, 
function name must abut the opening parenthesis:  somme(3,5).  you 
don't even need to use "put" before the function, if executed from the 
message box.

i have always loved this one, myself:

function sumThese
  put 0 into theTotal
   repeat with i = 1 to the paramCount()
     add param(i) to theTotal
   end repeat
   return theTotal
end sumThese

no need to submit only two numbers to add this way.  :)  of course, you 
can do the same thing with revolution's built-in sum() function, making 
this all pretty academic.

j.