# Using loop to create multiple variables

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Carson Wallace on 13 Oct 2020
Commented: Carson Wallace on 13 Oct 2020
Say I wanted to create 16 variables: x1, x2, ... x16. Each x variable is equal to b1, b2, ... b16 * some scalar A. Could I use a for loop to accomplish this task? I was thinking along the lines of:
for i = 1:1:16
x_i = b_i * A
i = i+1
end
But this won't work.
Stephen23 on 13 Oct 2020
"Say I wanted to create 16 variables: x1, x2, ... x16. Each x variable is equal to b1, b2, ... b16 * some scalar A."
That would not be a very good use of MATLAB. The MATLAB documentation states "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended. The preferred method is to store related data in a single array."
Storing data in one array makes it easy to write simple and efficient MATLAB code. Is there are a particular reason why you want to make your task complex and inefficient? What are you actually trying to achieve here? What is the goal?

Sudhakar Shinde on 13 Oct 2020
you can try this:
%b is a vector contains values from 1,2,3....to 16.
b = 1:16;
A=2; % A is a scalr whose value is 2
for i = 1:1:16
x(i) = b(i) * A;
i = i+1;
end
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Carson Wallace on 13 Oct 2020
Thank you. This answers my question.