1var a="a";
2var aaa=a.repeat(3); // "aaa"
3

1// best implementation
2repeatStr = (n, s) => s.repeat(n);

1setInterval(function(){
2  console.log("Hello");
3  console.log("World");
4}, 2000); //repeat every 2s

1repeatStr = (n, s) => s.repeat(n);