Any number divisible by 2 is an even number. Here we are using a while loop to iterate the given numbers range. And calculating the sum of all even numbers and printing them.

Steps :

- Here we are using a “scanner” to take input for value n from users.
- In the below program, we are starting iteration with 1 and checking its divisibility by 2 to check number is even or not.
- If the condition satisfied means the number is even, we are adding only that number to a variable “sum” to find the calculation of all even numbers.
- For eg . 4%2 = 0, conditions satisfied. Now 4 is qualified to be added to the sum variable. (sum = sum +4).

## Java Program to find sum of all even numbers between 1 to n

```
import java.util.*;
public class Main
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int start = 1;
System.out.println("Ender Number till you want Even number sum : ");
int end = sc.nextInt();
int sum = 0;
while(start<=end) {
if(start%2 == 0) {
sum = sum + start;
}
start++;
}
System.out.println("Sum of all Even numbers is : " +sum+ ".");
sc.close();
}
}
```

**Output**

```
Ender Number till you want Even number sum :
20
Sum of all Even numbers is : 110.
```