1
2var str = "Hello world!";
3
4 str.repeat(2);
5 

1// hey buddy, here are different implementations, choose your favourite !!
2
3
4// best implementation
5repeatStr = (n, s) => s.repeat(n);
6
7
8// short
9function repeatStr(n, s) {
10  return s.repeat(n);
11}
12
13
14// without using repeat
15function repeatStr(n, s) {
16  var str = "";
17  for (var i = 0; i < n; i++) str += s;
18  return str;
19}