Arrays are a data structure in Java that store a fixed-size sequential collection of elements of the same data type. An array can be initialized with a size, indexed to store and retrieve elements, and iterated through. Multidimensional arrays can also be created to store arrays within arrays, such as an array with 10 rows and 20 columns.

1. Arrays

2. • data structure in Java
• store a fixed-size sequential collection of
elements
• same data type.
• int[] arr;

3. Initialize an Array in Java
• int[] arr= new int[5];
• Indexing
• Array Literals
– int arr[5]={22,25,30,32,35};
– int[] ints2 = new int[]{ 1,2,3,4,5,6,7,8,9,10 };
• arr[0]=1;

4. Retrive data
• single retrive
• array lenght
• Iterating Arrays

5. Multidimensional Java Arrays
• int[][] intArray = new int[10][20];

6. Multidimensional Java Arrays
• int[][] intArray = new int[10][20];