Please can anyone help me in learning javascript.

Question

We have cout n cin commands in c++ like that any commands to get information from user

Answer 1

https://www.w3schools.com/js/js_popup.asp
^You can have it prompt you for input.

However, remember that you're often using this with websites. JavaScript can play off of your HTML/CSS elements, so you can have normal HTML text/input/etc... and have JS use that as its input. Read through HTML/CSS/JavaScript together, and you'll be able to use all of the above to accomplish your tasks easily.

Answer 2

you an get information from the user in pure javascript with prompt()

var name = prompt("Enter yout name: \n");

also you can use HTML textbox or input and get their value

Answer 3

correct:
document.getElementById('demo').innerHTML

answer:
you can view or edit
<div id="demo">
this
</div>
using that js function

why:
document.getElementById(id) returns an html element with that id
element.innerHTML access to between its html tags

then:
document.getElementById('demo').innerHTML access to the inner html of an element with id='demo'

Answer 4

What is document.getElementByid(demo).inner html