Arrays

• Array is a collection of elements stored in a contiguous block of memory locations.
• Arrays are a collection of similar data types.
• Arrays shares same name with different index numbers starting from zero(0).
• Arrays are reference type, hence they stored in heap memory.
• Some of the Array methods.s
• Array.Length()         //returns no of elements
• Array.GetLength(0)         //returns no of rows
• Array.GetLength(1)         //returns no of columns (for multi-dimentional arrays)
• Array.Sort()         //returns ascending order
• Array.Reverse()         //returns in reverse order
• Arrays are three types. They are…

1. One Dimensional arrays:
   
   E.g.: int [] x= new int [] {1, 2, 3};
   
2. Multi Dimensional arrays:
   
   Arranging a set of elements in rows & columns is called multi dimensional array.
   E.g.: int [,] x= new int [2,2];
   
3. Jagged arrays:
   
   Jagged array is a collection of number of rows which may contain discrete number of the elements in each row. It is also called as Dynamic array or Array of array.
   
   
   E.g.: int [][] x= new int [2][];
   
   x[0]=new int [] {1, 2, 3};
   
   x[1]=new int [] {4,5}