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