Fast Enumeration

This variant of the for loop sets up a fast enumeration. var is a variable whose type can also be declared , expression is an expression that produces a result that conforms to the NSFastEnumeration protocol.Typically, expression is a collection, such as an array or a dictionary.

for ( var in expression )

      programStatement

Ex: for (NSString *empName in employees) {

             NSLog(@"empName = %@", empName);

      }

     

Note: The fast enumeration is not index based like for loop.