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
//assign gray_out = bin_in^(bin_in>>1);