Question

I'm trying to make the code below work by modifying it so that e^-x will work, essentially I'm trying to modify it so that e^-x is 1/e^x
I'm really not sure how to do that..Here is my code..
function [result] = eTaylor(x, n)
% approximate e^x
% using first n non-zero terms of the Taylor series
% e^x = 1 + x + x^2/(2!) + x^3/(3!) + ......
result = 0.0; term = 1.0;
for i = 1::1:n
result = result + term;
term = term*x/i;
end