I don't understand the answer to this one...

Hi there! So, I'm going to post the example code here so we can see it a bit more clearly.

$username = "Treehouse";
if ($username) {  // first if statement
    if ($username != "Treehouse") {
        echo "Hello $username";
    }
} else {  // matches the first if statement
    echo "You must be logged in";
}

Ok, so first we set the $username to be Treehouse and you seem to be understanding that part just fine. So now we go down to our first if statement. If the value stored in $username is a truthy value, then we will execute what's inside that block. And this is what happens. We execute what's inside the block.

The trick is here that what's inside that block is yet another if statement. It says that if the name is not "Treehouse", to echo out "Hello $username". But it is "Treehouse" so that echo doesn't happen.

And then we're done. Remember that an else statement matches with an if statement. I put in comments to show the if and the else that match up. If the condition in the if statement evaluates to true (which it did) then the else statement will not be run meaning that the "You must be logged in." echo never happens either.

The end result is that nothing is displayed.

Hope this helps!