Why sololearn says to the output is 6?

Question

Mystring="abcdef"";
Console.log(Mystring.lenght)

Answer 1

What output would you expect?

Answer 2

By the way, it doesn't output 6 because you have to many speech marks :)

Answer 3

And length is spelt wrong

Answer 4

I just see this not normally but i have some knowledge with js miss