# Adding an element during each iteration of the loop at the end of an existing array

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Rishabh Umrao on 28 Jan 2019
Edited: Rishabh Umrao on 29 Jan 2019
MacLaurin equation
function result = MacLaurin(a,n)
% Program to calculate MacLaurin expression
% calculating factorial for the expression
fact = [1];
a = [1]
vec = [1:n];
% loop to calculate factorial and add the element to fact
for i = 2:n
c = prod(1:i);
% now i want to add c to array fact
fact[,c];
end
% here i want to put respective factorial values, how to write this part?
a = [a, 1./fact];
b = [1, a.^vec];
% adding respective elements to obtain final expression
result = 1 + b./a;
result = sum(result);
end

Alberto Mora on 28 Jan 2019
Edited: Alberto Mora on 29 Jan 2019
Try this:
function Res = MacLaurin(a,n)
% Program to calculate MacLaurin expression
% calculating factorial for the expression
Res=0;
% loop to calculate factorial and sum to the previous
for i = 0:n
Res = Res + a^i/factorial(i);
end
end
Regards
Rishabh Umrao on 29 Jan 2019
Edited: Rishabh Umrao on 29 Jan 2019
Hi Alberto,
Yes, your method is correct and answer it is giving is also correct but,
I was trying to ask that if we can do by this method -->
function result = MacLaurin(a,n)
% Program to calculate MacLaurin expression
% calculating factorial for the expression
a = cumprod(1:5);
disp(a);
b = 1./a;
vec = 1:5;
d = 0.5.^vec;
c = 1 + sum(d.*b);
result = c;
end
I did some brain storming and found out one silly mistake that was creating some error.
By the way thanks for answering my doubt and showing me another method which can give the same result.
I was particular about this method because my assignement was to solve in this way, without using loops.

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