17. Binary to Gray Code Converter

How do you plan to solve it?

module bin2gray4 (
    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]};
    assign gray_out = bin_in ^ (bin_in >> 1);
endmodule