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[3] = bin_in[3];
    assign gray_out[2:0] = bin_in[3:1] ^ bin_in[2:0];
endmodule