dear hilmar.
thank you for your help,
e.i let g(x)=e^-x+x-0.9
use p0=0.1 and the iteration=g(pn)
to cmpute p1,p2,p3
step 1: put 0.1 in (e^-x+x-0.9)

manualy soluation

n
....
0 p0=0.1
1 p1=g(p0)=0.104584
2 p2=g(p1)=0.10534
3 p3=g(p2)=0.10536 end result(fixed point)

i need to change manualy to vfp code.(program with function maybe)