Learning C# 3.0

Summary

• An array is an indexed collection of objects, all of the same type.

• You declare an array by giving the type of objects the array contains, followed by the square bracket operator ([]), followed by the name of the array. You then instantiate the array with the new keyword and the number of elements the array will contain.

• The index of the first element in the array is always zero, and the index of the last element in the array is always Length-1.

• You can use a for loop to iterate through the array, by using the loop’s counter as the index to the array.

• The foreach statement allows you to iterate through the items in the array (or any other collection) without the need for a counter.

• The elements of an array can be initialized when the array is created by providing the values of the members in curly braces ({}).

• The params keyword lets you pass an arbitrary number of parameters of the same type into a method; the method will treat the parameters as a single array.

• Arrays can contain more than one dimension. A two-dimensional array has two indexes, which you can think of as rows and columns.

• A rectangular array is a two-dimensional array in which all the rows have the same number of columns.

• A jagged array is an array of arrays—the rows do not need to be all the same length.

• The Length property of an array returns the total number of elements in the array.

• The array class contains a number of methods for searching, sorting, and manipulating the elements.

Although arrays may seem like a ...