# Program to Find sum of N Natural Numbers

### Example:-

1, 2, 3, 4, 5, 6.......N.

#### Sample Input/Output:-

Sample Input First: 25                         Sample Output First: 325

Sample Input Second: 23                    Sample Output Second276

#### Explanation:-

For output 1st: 1+2+3+4+6+7.......+24+25=325

For output 2nd: 1+2+3+4+6+7.......+22+23=276

Data requirement:-

Input Data:- n

Output Data:-Sum

Program in C

Here is the source code of the C Program to find the sum of first n natural numbers.

Code:

#include<stdio.h>
int main()
{
int n, i;

//Take input number of natural number
printf("Enter the N value:");
scanf("%d",&n);
int sum=0;

//Calculate sum of the n natural number
for(i=1;i<=n;i++)
{
sum=sum+i;
}
//display the sum of the n natural number
printf("The sum of N Natural numbers is %d",sum);
}

Input/Output:
Enter the N value:25
The sum of N Natural numbers is 325

Program in C++

Here is the source code of the C++ Program that asks the user for a number n and prints the sum of the numbers 1 to n.

Code:

#include<iostream>
using namespace std;
int main()
{
int n;

//Take input number of natural number
cout<<"Enter the N value:";
cin>>n;
int sum=0;

//Compute sum of the n natural number
for(int i=1;i<=n;i++)
{

sum=sum+i;
}

//display the sum of the n natural number
cout<<"The sum of n natural numbers is "<<sum;
}

Input/Output:
Enter the N value:23
The sum of n natural numbers is 276

Program in Java

Here is the source code of the Java Program to find the sum of n natural numbers using for loop.

Code:

import java.util.Scanner;
public class SumOfNnatrual {

public static void main(String[] args) {
Scanner cs=new Scanner(System.in);
int n;

//Take input number of natural number
System.out.println("Enter the N value:");
n=cs.nextInt();

//Compute sum of the n natural number
int sum=0;
for(int i=1;i<=n;i++)
{
sum=sum+i;
}

//display the sum of the n natural number
System.out.println("The sum of n natural numbers is "+sum);
cs.close();
}
}

Input/Output:
Enter the N value:
45
The sum of n natural numbers is 1035

Program in Python

Here is the source code of the Python Program to find the sum of n natural numbers using for loop.

Code:

#Take input number of natural number
n=int(input("Enter the N value:"))

#Calculate the sum of the n natural number
sum=0
for i in range(1,n+1):
sum=sum+i

#display the sum of the n natural number
print("The sum of n natural numbers is ", sum)

Input/Output:
Enter the N value:55
The sum of n natural numbers is  1540