Difference between document.write(funName()) and document.write(funName ())

Question

The code below outputs "bar" but if we insert a space between printName and () in first line like document.write(name, printName ()) it will output "foobar". Can someone please explain me what is the meaning of this space here.

document.write(name, printName());
var name="foo";
function printName(){
return "bar";
}

Answer 1

When you run the code first, in line 1, `name` is undefined, so it will not print. That's because you define `name` in line 2.
If you run the same code a second time it works, with space or without, because `name` is set to "foo".

I thought I was going nuts for a second, funny bug!

Answer 2

Space shouldnt change anything, lookup for scope and hoisting

Answer 3

Thanks for the help i got it now, what i m doing wrong.