Why does this program keep crashing?

Question

function chkOp(c) {
ops = ['+','-','*','/'];
for (var y = 0;x<ops.length;y++) {
if (c == ops[y]) {
return true;
}
}
return false;
}

function wrapList(msg) {
var list = [];
for (var x=0;x<msg.length;x++) {
if (x == 0) {
list[x] = msg[x];
}
else if (!(chkOp(msg[x]) && !(chkOp(msg[x-1]))) {
list[x-1] += "" + msg[x];
// 6+6 = 66 instead of 12 (by adding quote)
}
}
return list;
}

document.write(wrapList("65+22"));

Answer 1

at the for loop for array you wrote x< instead of y<
it is y<ops.length unlike x<msg.