C# 0 The Complete Reference

PART I

C h a p t e r   7 :  

A r r a y s   a n d   S t r i n g s  

153

PART IPART I

foreach(

type loopvar

 in 

collection

)

statement

;

Here, 

type loopvar

 specifies the type and name of an 

iteration variable.

 The iteration variable 

receives the value of the next element in the collection each time the 

foreach

 loop iterates. 

The collection being cycled through is specified by 

collection,

 which, for the rest of this 

discussion, is an array. Thus, 

type

 must be the same as (or compatible with) the element 

type of the array. Beginning with C# 3.0, 

type

 can also be 

var

, in which case the compiler 

determines the type based on the element type of the array. This can be useful when 

working with certain queries, as described later in this book. Normally, you will explicitly 

specify the type.

Here is how 

foreach

 works. When the loop begins, the first element in the array is 

obtained and assigned to 

loopvar.

 Each subsequent iteration obtains the next element from 

the array and stores it in 

loopvar.

 The loop ends when there are no more elements to obtain. 

Thus, the