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Iterator Functions in C#
An iterator method performs a custom iteration over a collection. It uses the yield return statement and returns each element one at a time. The iterator remembers the current location and in the next iteration the next element is returned.
The following is an example −
Example
using System;
using System.Collections.Generic;
using System.Linq;
namespace Demo {
class Program {
public static IEnumerable display() {
int[] arr = new int[] {99,45,76};
foreach (var val in arr) {
yield return val.ToString();
}
}
public static void Main(string[] args) {
IEnumerable ele = display();
foreach (var element in ele) {
Console.WriteLine(element);
}
}
}
}Output
99 45 76
Above, we have an iterator method display() that use the yield statement to return one element at a time −
public static IEnumerable display() {
int[] arr = new int[] {99,45,76};
foreach (var val in arr) {
yield return val.ToString();
}
}The result is stored and each element is iterated and printed −
IEnumerable ele = display();
foreach (var element in ele) {
Console.WriteLine(element);
}
Updated on: 20-Jun-2020
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