How to know if object address is 0x0?

Question

I want to check if my object address is 0x0. How to do it in objective c?

Accepted Answer

Just compare the reference as

```
if (obj == nil)
```

or

```
if (obj == NULL)
```

or

```
if (obj == 0)
```

or

```
if (!obj)
```

You can use any one of them they all are same.

Solution