17. Binary to Gray Code Converter

How do you plan to solve it?

/*Write your code here*/
module bin2gray4(
    input [3:0] bin_in,
    output [3:0] gray_out
);
    assign gray_out={bin_in[3],
    bin_in[3]^bin_in[2],
    bin_in[2]^bin_in[1],
    bin_in[1]^bin_in[0]};
endmodule