Find Sum of List Elements with forEach Method in Dart Lambda

void main() {
    var numbers = [5, 10, -4, 27, -8, 6, -2];

    var sum1 = 0;
    numbers.forEach((number) => sum1 += number);
    print("Sum 1: ${sum1}");

    var sum2 = 0;
    numbers.where((number) => number > 0).forEach((e) => sum2 += e);
    print("Sum 2: ${sum2}");

}  

Output

Sum 1: 34
Sum 2: 48