undefined list item check

by karin

JavaScript

var list = [16, 45, 48];
for (var i = 0; i < list.length + 1; i++) {
    if (!list[i]) {
        alert(list[i]+'is undefined');
    }else{
       alert(list[i]);
    }
}

/*if (list[3] == undefined) {
    alert('undefined');
}*/
/*
var myval=null;
if(myval){
alert(myval);
}else{
alert('nothing');
}
*/