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)
     assign gray_out[i] = bin_in[i] ^ bin_in[i+1];
endgenerate
assign gray_out[3] = bin_in[3] ;
endmodule