join array of letters in javaScript code example

Example 1: can you do a join() in js without the commas

arr.join("")

Example 2: js join

//turns array to string

const elements = ['Fire', 'Air', 'Water'];

console.log(elements.join());
// expected output: "Fire,Air,Water"

console.log(elements.join(''));
// expected output: "FireAirWater"

console.log(elements.join('-'));
// expected output: "Fire-Air-Water"