/C#/Find sum of multiples of a number up to N

Find sum of multiples of a number up to N

How to find sum of two nums

#include<stdio.h>
int main() {
int a, b, sum;
printf("\nEnter two no: ");
scanf("%d %d", &a, &b);
sum = a + b;
printf("Sum : %d", sum);
return(0);

Find sum of multiples of a number up to N

// 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

50 votes109 views4 answers
Unity how to load a scene
C#
0 vote113 views1 answer
Encrypt with public key and decrypt with private key c#
C#
14 votes112 views4 answers
One line condition c#
C#
0 vote100 views1 answer
Unity convert number to notation
C#
0 vote105 views1 answer
Save binary data to file c#
C#
0 vote157 views1 answer
LINQ query on a DataTable C#
C#
0 vote113 views2 answers
How to encode and decode a string in c#
C#
0 vote102 views1 answer
Singleton pattern c# stack overflow
C#
20 votes152 views2 answers
Fill dictionary c#
C#
1 vote114 views1 answer
How to make a specific scene load only on game start in unity
C#