Any one explain the ouput of following JavaScript Code?

[Soorajgit]

var count = function ()
{
this.c = 0 ;
var add = function () {
return ++this.c;
};

this.addNum = function (n)
{
for(i= 0; i<n ; i++) {
}
return this.c ;
};
}

Output of this and explanation since i am new JS.
console.log(new count().addNum(10));
or
console.log(new count.add());

[LinusU]

This is the issue tracker for a particular linting style for JavaScript, and it's not for general JS questions ☺️