17. Binary to Gray Code Converter

How do you plan to solve it?

/*Write your code here*/
module bin2gray4(bin_in,gray_out);
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