int i = 1024;

while(i > 0) {
  write(i);
  i = i # 2;       //or also i = quotient(i, 2);
}

//# Integer division; equivalent to quotient(x,y).
//Noting that the Python3 community adopted the comment symbol (//) for integer division, the
//Asymptote community decided to reciprocate and use their comment symbol for integer division!