why does this code not work?

Question

Hello
why does this javascript code not work?
I just can not recognize the mistake ...
this code is supposed to create a simple table. I have this code from a book

https://code.sololearn.com/WbgQmPRgGaLL

Answer 1

You misspelled ”length” in your for loop. Line 21

You use capital letters when accessing firstname and lastname contact properties. Lines 28 and 34

Answer 2

Thank you for the quick help!
now it works .. great