Calculate Sum of List elements using Java Stream

In order to calculate the sum of all elements using Java Streams, we need to make use of the reduce function.

package org.code2care;

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>();
        list.add(10);
        list.add(20);
        list.add(30);
        list.add(40);
        int sum = list.stream().reduce(0,Integer::sum);
        System.out.println("Sum="+sum);

    }
}

Sum=100