Multiple if blocks or a single if with AND condition

Question

If I need to check multiple conditions, which is the preferred way with respect to performance

if( CND1 && CND2 && CND3 && CND4)
{
}
else
{
}

or

  if(CND1)
{
   if(CND2)
   {
      if(CND3)
      {
         if(CND4)
         {
         }
         else
         {
         }
      }
      else
      {
      }
   }  
else
   {
   }
}
    }

Answer 1

The performance is the same since it will stop checking the arguments once it has found a false one (short-circuiting), so definitely go with the first one. It's one line compared to like, 10. It also means that your else will be much easier to handle.