Practice›Java Fundamentals›Module 11. Modern Java›11.4 Lambdas and streams

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11.4 Lambdas and streams — sum of squares

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Task

Fill in sumOfSquares using a stream so that it returns the sum of the squares.

mapToInt turns each element into an int, and sum() adds them. The program prints 30 (1+4+9+16) and then 0.

Your solution

import java.util.List;

public class Main {

    public static int sumOfSquares(List<Integer> nums) {
        // stream: square each value, then add them up

    }

    public static void main(String[] args) {
        List<Integer> nums = List.of(1, 2, 3, 4);
        System.out.println(sumOfSquares(nums));
        System.out.println(sumOfSquares(List.of()));
    }
}

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