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 reg [3:0] gray_out
);

always @(*) begin
    gray_out[3] = bin_in[3];
    gray_out[2] = bin_in[3] ^ bin_in[2];
    gray_out[1] = bin_in[2] ^ bin_in[1];
    gray_out[0] = bin_in[1] ^ bin_in[0];
end

endmodule