Csharp/CSharp Tutorial/Statement/Foreach — различия между версиями
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Текущая версия на 15:20, 26 мая 2010
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>