Question: How to define user defined function like Mattlab?

I want to produce a user defined function in Maple and use it in my program like Matlab. My function in Matlab is as below:

function R=ff(i,m)
K=1;
Q= zeros( i );
for j=1:2:i
 Q(j)=2*i-K;
 K=4+K;
end
R=Q(m);

How to produce this function in Maple and use it in my program?

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