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
);

genvar i;
generate
    for(i = 0; i < 3; i=i+1) begin 
        assign gray_out[i] = bin_in[i] ^ bin_in[i+1];
    end
endgenerate

assign gray_out[3] = bin_in[3];

endmodule