Question

I have variable deleteboxvalue

var deleteboxvalue = "111111111111111";
if(deleteboxvalue.indexOf('0') >= 0) {
    alert("You can't delete all Contact Number.");
return false;
} 
else { 
    alert("All Zeros are not selected."); return true;
}

I want to check if 0 is not exist in this I want to return false and alert as “You can’t delete all Contact Number.” but in both cases if 0 exist in variable in that case also its returning false and giving me alert as “You can’t delete all Contact Number.”

Answer 1

I want to check if 0 is not exist in this I want to return false

If that’s the case then you’ve got your logic reversed. You are currently returning false if 0 is in the string (i.e. it is found at an index greater than or equal to 0). If you want to return false when 0 is not found in the string, you can do this:

if(deleteboxvalue.indexOf('0') == -1) {
    alert("You can't delete all Contact Number.");
    return false;
} 
else { 
    alert("All Zeros are not selected."); 
    return true;
}

However, I may have completely misunderstood what you’re trying to do…