assigning indices to matrices

[shruti sharma]

Dear all,
      I want to assign an index (say n) to the matrix carrying the same "n" as variable. For this I have written program as a seperate function file, which I call as "U(n)".
       My problem is that I want to run a loop over "n" say from 1 to 10 and multiply the matrices U(1) * U(2)......* U(n). But not able to run the loop. Please suggest me the wayout.
      Thanks in advance

Sincerely,
Shruti


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