For an integer N, your task is to calculate the sum of first N natural numbers. **Input User Task:** Since this will be a functional problem, you do not have to worry about input. You just have to complete the function NumberSum() which takes the integer(large value possible) N as a parameter. **Constraints:** 1 <= N < = 100000000 **Output** Print the sum of first N natural numbers.

**Example**

**Input** 5

**Output** 15

**Input** 1

**Output** 1

## Solution of Sum of natural numbers :–

```
import java.util.*;
import java.lang.*;
import java.io.*;
public class Main
{
static void NumberSum(long N)
{
long sum=0;
for(int i=1;i<=N;i++)
{
sum=sum+i;
}
System.out.println(sum);
}
public static void main (String[] args) throws java.lang.Exception
{
//your code here
Scanner sc = new Scanner(System.in);
long N = sc.nextLong();
NumberSum(N);
}
}
```

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