> result
"Hello 1\nHello 2\nHello 3\n"

> var result = "";
> 
> for (var i = 1; i <= 3; i++)
. {
.     result += "Hello\n";
. }
> 
> result
"Hello\nHello\nHello\n"
> var sum = 0;
> 
> for (var i = 1; i <= 100; i++)
. {
.     sum += i; 
. }
>