task-prototype.js

/*
1. create method in string prototype
2. it should return multiple repeated string by n times

consle.log( "foo".repeat(3) ); // 'foofoofoo'
*/

String.prototype.repeat = function(times) { //or use built-in ES6 repeat()
  return new Array(times + 1).join(this);
};

consle.log( "foo".repeat(3) );