Csharp/CSharp Tutorial/Statement/Foreach

Search an array using foreach.

<source lang="csharp">using System;

class MainClass {

 public static void Main() { 
   int[] nums = new int[10]; 
   int val; 
   bool found = false; 

   for(int i = 0; i < 10; i++)  
     nums[i] = i; 

   val = 5; 

   foreach(int x in nums) { 
     if(x == val) { 
       found = true; 
       break; 
     } 
   } 

   if(found)  
     Console.WriteLine("Value found!"); 
 } 

}</source>

Value found!

Use foreach on a two-dimensional array.

<source lang="csharp">using System;

class MainClass {

 public static void Main() { 
   int sum = 0; 
   int[,] nums = new int[3,5]; 

   for(int i = 0; i < 3; i++)  
     for(int j=0; j < 5; j++) 
       nums[i,j] = (i+1)*(j+1); 

   foreach(int x in nums) { 
     Console.WriteLine("Value is: " + x); 
     sum += x; 
   } 
   Console.WriteLine("Summation: " + sum); 
 } 

}</source>

Value is: 1
Value is: 2
Value is: 3
Value is: 4
Value is: 5
Value is: 2
Value is: 4
Value is: 6
Value is: 8
Value is: 10
Value is: 3
Value is: 6
Value is: 9
Value is: 12
Value is: 15
Summation: 90

Use the foreach loop.

The foreach loop is used to cycle through the elements of a collection.

The general form of foreach is shown here:

<source lang="csharp">foreach(type var-name in collection)

      statement;</source>