How to prevent values from being converted to strings in javascript?

Question

    var str;
    var displayedNum;
    for (i in imgURLArray){
        str = \"
\" + \"\"+ (1+i) + \"\" + \"
\         


        

Answer 1

The reason is due to your loop:

for (i in imgURLArray){

This iterates over all the property names of imgURLArray as strings. So you will need to use Number() to convert i to an integer:

    str = "
" + ""+ (1+Number(i)) + "" + "
";