const myText = "It is a long established fact that a reader will"
const newText = myText.split(" ").join("-")
console.log(newText);//It-is-a-long-established-fact-that-a-reader-will
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
// does not change the existing strings, but
// returns a new string containing the text
// of the joined strings.//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"
const str1 = 'Hello';
const str2 = 'World';
console.log(str1 + str2);
>> HelloWorld
console.log(str1 + ' ' + str2);
>> Hello WorldArray.join()const elements = ['Fire', 'Air', 'Water'];
console.log(elements.join()); // => "Fire,Air,Water"
console.log(elements.join('')); // => "FireAirWater"
console.log(elements.join('-')); // => "Fire-Air-Water"