자바스크립트 1 22 333 4444 5555... 패턴

var i, j;
for (i = 1; i <= 5; i++) {
  for (j = 1; j <= i; j++)
    document.write(i);
  document.write("<br>");
}

document.write("<br>");

var a, b;
for (a = 5; a >= 1; a--) {
  for (b = 1; b <= a; b++)  	
    document.write(a);
  document.write("<br>");
}

 

 

1
22
333
4444
55555

55555
4444
333
22
1