How do I make JavaScript generate a new link?

I have searched so much for this. How do I make JS make a link that goes something along the lines of example.com/index.php#number?

Example of what i mean – https://gyazo.com/428ea0c819d340a699a328baaf4c1c1f

>Solution :

Lets say that you have your base address, "http://www.example.com/index.php", what you want to do is to add a new part to the url

const base = "http://www.example.com/index.php"
let number  = 42
location.href = base + "#" + number

which will redirect you to "http://www.example.com/index.php#42"