The
foreach statement repeats a group of embedded statements for each
element in an array or an object collection. The foreach statement is
used to iterate through the collection to get the desired information, but
should not be used to change the contents of the collection to avoid
unpredictable side effects.
The embedded statements continue to execute for each element
in the array or collection. After the iteration has been completed for all the
elements in the collection, control is transferred to the next statement
following the foreach block.
At
any point within the foreach block, you can break out of the loop using
the break
keyword, or step directly to the next iteration in the loop by using the continue
keyword.
A foreach
loop can also be exited by the goto,
return,
or throwstatements.
For
more information on the foreach keyword and code samples, see the
following topics:
Using
foreach with Arrays (C# Programming Guide)
How
to: Access a Collection Class with foreach (C# Programming Guide)
Example
In this example, foreach is used
to display the contents of an array of integers.
cs_foreach.cs
class
ForEachTest
{
static void Main(string[]
args)
{
int[] fibarray = new int[] { 0, 1, 2,
3, 5, 8, 13 };
foreach (int i in fibarray)
{
System.Console.WriteLine(i);
}
}
}
Output
0
1
2
3
5
8
13