54. Population Count

How do you plan to solve it?

module popcount8 (
    input  [7:0] in,
    output reg [3:0] count
);
    integer i; 
    always @* begin
        count = 4'd0;          // default to avoid latch

        // Use a for-loop to accumulate the number of '1' bits
        for (i = 0; i < 8; i = i + 1) begin
         if(in[i] == 1'b1) count = count + 1 ;
         else count = count ;

        end
    end
endmodule