How to create variables between two strings?

Question

The result I am getting is 4n and what I want is 4 n. I the concatenating sign between the two variables in variable e but it still not working so I wondering what is wrong.

var firstletter="";
var f="John";
var d="";
d=f.length
firstletter=f[3];
var e=d+ "" +firstletter;
console.log(e)

Answer 1

Anyanwu Johnbosco Chima Give space inside quote marks.

Answer 2

var e=d+" "+firstletter;
Put space inside quote marks.