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


// module bin2gray4 #(parameter W=4)(
// input [W-1:0] bin_in,
// output reg [W-1:0]gray_out);
// integer i;
// always@(*) begin
// gray_out[W-1]=bin_in[W-1];
// for(i=W-2;i>=0;i--) begin
// gray_out[i]=bin_in[i]^bin_in[i+1];
// end
// end
// endmodule