objective c - how can I retrieve values from NSMutableArray having object with multiple values -

i have nsmutablearray has 4 objects, , each object has further elements in it, want retrieve elements i.e.

object @ index 0 has 15 values( ns strings) same rest of 3 objects

i don't know syntax of how can read values below syntax have tried gives me error:

for(int i=0 ; i<[array count] ; i++) {     (int j=0 ; j<[array[i] count] ; j++) {         /// reading code here     } }  

very simple example 2 inner arrays containing 3 items respectively , fast enumeration:

nsarray *array = @[@[@"1", @"2", @"3"], @[@"4", @"5", @"6"]]; (nsarray *subarray in array) {   (nsstring *item in subarray) {     nslog(@"%@", item);   } }