Use Aggregate Operators: Count
using System; using System.Collections.Generic; using System.Linq; using System.Text; public class MainClass { public static void Main() { int[] factorsOf300 = { 2, 2, 3, 5, 5 }; int uniqueFactors = factorsOf300.Distinct().Count(); Console.WriteLine("There are {0} unique factors of 300.", uniqueFactors); } }
1. | Count with string value | ||
2. | Count with string operator | ||
3. | The aggregation operators return a scalar value | ||
4. | Conditional Count | ||
5. | Nested Count |