how to find a value of matrix in a specific position?

Lets say I have a matrix A=[1 2 3;2 4 5;6 5 4] and I want to find value at i=2 j=3 which is 5. But I want that program finds that value for me. For example i want something like that, short description " if at i=2 j=3 value is 5, end program, else check i=3 j=1". I would appreciate if someone can help me.

Answer 1

[Sara]

    if(A(2,3) == 5)
      ...your code
    elseif(A(3,1) == 89)
      ...your code
    end

[Akmyrat]

thanks a lot Sara :)