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