Why does the "for in " loop say undefined when I use the dot syntax to get attributes of an object?

Question

And yet it works when I use object[attribute]
https://code.sololearn.com/WrKa6A35X5qz/?ref=app

Answer 1

Ipang aah I see, thank you

Answer 2

Line 10
for ( let val in dude1 )
{
console.log( val );
}

Here <val> represents each attribute name (not value) in <dude1>.