var n; do { write("Enter number of lines: "); n = read(); } while (n<1 || n>9 || isNaN(n)); for (var i=1; i<=n; i++) { for (var j=n; j>=1; j--) { write(j); } write("\n"); }
(
)
{
}
[
]
"
;
=
+
-
*
!
/
%
&
|