returning error in javascript

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."

James Allardice · Accepted Answer · 2011-10-25 10:06:51Z

2

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...

answered Oct 25, 2011 at 10:06

James Allardice

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1 Comment

Rahul Singh Over a year ago

I meant I have group of boxes for deleting contact number. I have created condition using loop and taken value in variable if checkbox is selected I have added 1 in variable else added 0. FInally I created variable as deleteboxvalue = "111111111111111"; Now I want to check if 0 exist in this I want to return true if 0 doesn't exist I want to return false.

Jonathan Leffler · Accepted Answer · 2011-11-30 00:14:49Z

0

Create a function in JavaScript such as:

 function CheckContacts() {
    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;
    }
}

and

On body onload call that JavaScript method:
```
<body onload="CheckContacts()">
```

edited Nov 30, 2011 at 0:14

Jonathan Leffler

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answered Oct 25, 2011 at 10:18

Gourav khanna

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