C# 0 The Complete Reference

foreach

 cycles through an array in sequence from the lowest index to 

the highest.

Although the 

foreach

 loop iterates until all elements in an array have been examined, it 

is possible to terminate a 

foreach

 loop early by using a 

break

 statement. For example, this 

program sums only the first five elements of 

nums

:

// Use break with a foreach.

using System;

class ForeachDemo {

  static void Main() {

    int sum = 0;

    int[] nums = new int[10];

    // Give nums some values.

    for(int i = 0; i < 10; i++)

      nums[i] = i;

    // Use foreach to display and sum the values.

    foreach(int x in nums) {

      Console.WriteLine("Value is: " + x);

      sum += x;

      if(x == 4) break; // stop the loop when 4 is obtained

    }

    Console.WriteLine("Summation of first 5 elements: " + sum);

  }

}

This is the output produced:

Value is: 0

Value is: 1

Value is: 2

Value is: 3

Value is: 4

Summation of first 5 elements: 10

As is evident, the 

foreach

 loop stops after the fifth element has been obtained.

The

foreach

 loop also works on multidimensional arrays. It returns those elements in 

row order, from first to last.

// Use foreach on a two-dimensional array.

using System;

class ForeachDemo2 {

  static void Main() {

    int sum = 0;

    int[,] nums = new int[3,5];

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