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

4 votes286 views1 answer
How to reference a child object unity
C#
1 vote307 views1 answer
C# ipaddress from localhost
C#
10 votes334 views4 answers
C# list shuffle
C#
11 votes354 views2 answers
Unity change tmp text from script
C#Unity
0 vote321 views1 answer
Json serialize object capitalization config
C#
0 vote306 views1 answer
Decrease image size C#
C#
1 vote309 views1 answer
Add only bottom border to container flutter
C#
0 vote303 views1 answer
Entity framework delete record with foreign key constraint
C#
18 votes320 views4 answers
C# get current date
C#
21 votes360 views2 answers
Unity get distance between two objects
C#Unity