How to check if an instance of NSMutableArray is null or not

Question

How to check an NSMutableArray is null or not ?

Answer 1

There are multiple ways to check it.

1. if (array == [NSNull null])
   {
       //myarray is blank
   }
   

2. if(array.count==0)
   {
       //myarray is blank
   }
   

3. if(array == nil)
   {
       //my array is blank
   }