17. Binary to Gray Code Converter

How do you plan to solve it?

module bin2gray4(
    input [3:0] bin_in,
    output [3:0] gray_out
);
    assign gray_out = {
        bin_in[3],
        ^bin_in[3:2],
        ^bin_in[2:1],
        ^bin_in[1:0]
    };
endmodule