It ‘translates’ to: ‘integrate f with respect to ‘x’ from ‘y’ to ‘y’’. Since the limits of integration are the same, the result is zero (as would be expected).
If you’re copying this from somewhere else, the statement is a mystery to me as well. I can’t imagine the reason anyone would write it.
Also, integral is the name of a built-in MATLAB function that does numerical integration. It is not good programming practice to do that, since it ‘overshadows’ the function name with the variable, causing serious problems if you later want to use the integral function.
