Look at the following array definition: 看看下面的数组定义: [br][/br]int[] bigNumbers = new int[50]; [br][/br]How many elements does the array have? 数组有多少个元素?[br][/br] Answer: ____。[br][/br]What is the index of the first element in the array? 数组中第一个元素的下标是多少?[br][/br] Answer: ____。[br][/br]What is the index of the last element in the array? 数组中最后一个元素的下标是多少?[br][/br] Answer: ____。