I am new to Mathematica and I have a problem with the "For" statement. I am often in doubt where to place a "," or a ";".

I am stuck with the following : I want to generate random points in a unit circle with the following function :

randompunten[n_] := Module[{p = n, r, angle, lis, i},
  lis = {};
  For[i = 0;
   r = RandomReal[],
   angle = RandomReal[2 \[Pi]],
   i <= p;
   i++;

lis = Append[lis, Point[{r Cos[angle], r Sin[angle]]}]]]; lis]

The result is an empty lis

NB : I just found out that this is not the right way but aside of that : what am I doing wrong in the code ? (When I do the Append statement outside the module things work fine .