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What is Aggregate Function in LINQ?

Ethan Karla 328 24-Sep-2021

What is Aggregate Function in LINQ also define the sum(), min(), max(), count(), average() with example?

linq c#  ado.net  linq 
Updated on 24-Sep-2021
Ethan Karla

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An enthusiastic, adaptive, and fast-learning person with a broad and acute interest in the discovery of new innovative drugs, I particularly enjoy collaborating with scientists from different disciplines to develop new skills and solve new challenges.

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Ravi Vishwakarma

Ravi Vishwakarma

24-Sep-2021

An Aggregate function takes more than two arguments and works on the requirement. there are many aggregate functions in LINQ

SOME function of LINQ

  1. SUM()    return the sum of a collection
  2. MIN()    return the minimum of collection
  3. MAX()     returns the maximum collection
  4. COUNT()    return the length of the collection
  5. Average()    return is the average of a collection
  6. Aggregate()   returns the value as needed from a collection

Example

using System;
using System.Linq;
using System.Collections.Generic;

class MyProgram
{ 
 static void Main(string[ ] args)
    { 

  int[] intAry = {45,78,5,896,4,5,8,65,99,66,55,88,5,558,56,55,45,23};
  var Sum = intAry.Where(x => x%2 == 0).Sum();
  Console.WriteLine('Sum of array : ' + Sum);

  var Min = intAry.Min();
  Console.WriteLine('Min of array : ' + Min);

  var Max = intAry.Max();
  Console.WriteLine('Max of array : ' + Max);

  var Count = intAry.Count();
  Console.WriteLine('Length of array : ' + Count);

  var Avg = intAry.Average();
  Console.WriteLine('Average of array : ' + Avg);

  var Aggregate = intAry.Aggregate((a,b) => a+b);
  Console.WriteLine('Aggregate function of array : ' + Aggregate);

    } 
}

Output

Sum of array : 1754

Min of array : 4

Max of array : 896

Length of array : 18

Average of array : 119.77777777777777

Aggregate function of array : 2156

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