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

9 votes378 views10 answers
C# if else
C#
7 votes420 views1 answer
Unity 2d jump
C#Unity
1 vote299 views1 answer
How to chagne rotation in unity
C#
8 votes376 views1 answer
Round to float unity
C#Unity
0 vote343 views1 answer
C# formula from string
C#
0 vote332 views3 answers
Finding holydays asp.net
C#
1 vote373 views1 answer
Unity getcomponent not working on ui
C#Unity
1 vote334 views1 answer
Randomize through array in C#
C#
0 vote332 views1 answer
Unity script template folder
C#
14 votes359 views1 answer
Unity set position
C#