Wsrtjtyk

So i've got an array of 9 strings, predefined, and when i try to call them out in a function they come out as undefined, i don't really know what am i doing wrong :/

function checkAns(){

    var nr_pytania = (document.getElementById("q_id").value)-1;

    var odpowiedz = document.getElementById("answer").value;

    var odpowiedzi = ["Mazury", "Korfanty", "Paderewski", "Wersalski", "Zaolzie", "Orlęta", "Wisła", "Haller", "Gdańsk"];



        console.log(odpowiedzi[0].charAt[0]);

        if(odpowiedz == odpowiedzi[nr_pytania])

        {

            document.getElementById("answer").value = "POPRAWNE!";

                for(var i=0; i<odpowiedzi[nr_pytania].length; i++)

                {

                    document.getElementById("letter"+nr_pytania+i).innerHTML = odpowiedzi[nr_pytania].charAt[i];

                }

        }

        else

        {

            document.getElementById("answer").value = "Odpowiedź błędna!";

        }   

}

So, the part that is the most important to me is:

    var odpowiedzi = ["Mazury", "Korfanty", "Paderewski", "Wersalski", "Zaolzie", "Orlęta", "Wisła", "Haller", "Gdańsk"];



    console.log(odpowiedzi[0].charAt[0]);

Because the console returns undefined, and im not really sure why :(

var odpowiedzi = ["Mazury", "Korfanty", "Paderewski", "Wersalski", "Zaolzie", "Orlęta", "Wisła", "Haller", "Gdańsk"];



console.log(odpowiedzi[0].charAt(0));

You need to change it from charAt[0] to charAt(0).

Additional reading for String.prototype.charAt().

You could simply use odpowiedzi[0][0] - no need to use charAt() :)