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-willvar str = "How are you doing today?";
var res = str.split(" ");
var join = res.join(",");/* split methods splits string object into array of strings
and join method changes element of array into a string */
const name= "Shirshak Kandel"
const nameWithDash=name.split(" ").join("-")
console.log(nameWithDash);//Shirshak-kandelvar address = "foo";
var city;
var state = "bar";
var zip;
text = [address, city, state, zip].filter(Boolean).join(", ");
console.log(text)