Sum of multiples of a number

// C# program to find sum of multiples
// of a number up to N efficiently
using System;
 
class GFG {
 
    // Function for calculating sum
    // of multiples of a upto N
    static int calculate_sum(int a, int N)
    {
 
        // Number of multiples
        int m = N / a;
 
        // sum of first m natural numbers
        int sum = m * (m + 1) / 2;
 
        // sum of multiples
        int ans = a * sum;
 
        return ans;
    }
 
    // Driver code
    public static void Main()
    {
 
        int a = 7, N = 49;
        Console.WriteLine("Sum of multiples of " + a +
         " up to " + N + " = " + calculate_sum(a, N));
    }
}

Source: geeksforgeeks.org

Similar codes

0 vote209 views1 answer
C# convert enumb to int array
C#
3 votes211 views1 answer
Split with multiple delimiters c#
C#
-1 vote253 views1 answer
How to fix error cs1513 in unity
C#Unity
0 vote246 views1 answer
Unity upload image to project
C#Unity
0 vote219 views1 answer
Passing _ as out variable c#
C#
0 vote227 views1 answer
Remove force unity
C#
0 vote200 views1 answer
C# not function
C#
0 vote221 views1 answer
How to set the current user httpcontext.current.user asp.net -mvc
C#
1 vote236 views2 answers
Delegates in UnityC#
C#Unity
0 vote194 views3 answers
C# code examples
C#