javascript alerts and prompts code example

Example 1: prompt js

var answer = prompt("How are you? ");

Example 2: javascript prompt

var person = prompt("Please enter your name", "Harry Potter");

if (person != null) {
  document.getElementById("demo").innerHTML =
  "Hello " + person + "! How are you today?";
}

Example 3: alert in js returb value or not

Alert in JS doesn't return anything -- it just Displays Message