Sum Of a List Of Numbers In Dart

This blog will explore the Sum Of a List Of Numbers In Dart. We will also implement a demo program, and learn how to calculate the sum of a list of numbers in a dart in your applications.

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Table Of Contents::

Using fold() Method

Using a For loop

Using The reduce() Method

Using The Sum From The Collection Package

Using A for-each loop

Conclusion

Using fold() Method:

The fold() technique (for the List class) is a higher-order capability that applies a given function to every component in an assortment and collects the outcomes. In the model above, we pass an anonymous function that adds the two contentions (the aggregator and the ongoing value) together.

void main() {
  List<double> numbers = [1, 3, 5, 7, 9, 0.7, -2, 0.38, -0.38];
  double sum = numbers.fold(0, (a, b) => a + b);
  print(sum);
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

23.7

Process finished with exit code 0

Using a For loop:

For loop is a famous flow control that has been around for quite a while in most programming languages, including Dart. This is likewise an incredible asset that assists us with computing numerous things, remembering to track down the sum of the components for a given list.

void main() {
  final myListNumbers = [1, 3, 5, 7, 9, 4.2, 6.1, -6, -2.5];

  var sum = 0.0;
  for (var i = 0; i < myListNumbers.length; i++) {
    sum += myListNumbers[i];
  }
  print(sum);
}

When we run the application, we ought to get the screen’s output like the Console Output on the underneath screen.

26.799999999999997

Process finished with exit code 0

In this methodology, we utilize a for loop to iterate over the list of numbers (the two numbers and pairs) and add every element to a variable named sum.

Using The reduce() Method:

The reduce() method is like the fold() strategy, however, it doesn’t accept an initial value as its most memorable contention. All things considered, it involves the principal element in the collection as the initial value and applies the given capability to the excess elements. For this situation, we pass a similar function as in the fold() example.

void main() {
  final numbers = [1, 3, 5, 7.7, -2.2, 3, 4, 5, 6, 7];
  var sum = numbers.reduce((a, b) => a + b);
  print(sum);
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

39.5

Process finished with exit code 0

Using The Sum From The Collection Package:

First imports this package, we need to add this line.

import 'package:collection/collection.dart';

At the main look, this might appear to be the most limited approach. Thus, a few developers favor utilizing different ways to deal with this one.

// ignore: depend_on_referenced_packages
import 'package:collection/collection.dart';

void main() {
  final numbers = [150, 80, 0, 35, 2, 95];
  var sum = numbers.sum;
  print(sum);
}

When we run the application, we ought to get the screen’s output, like the console output on the underneath screen.

362

Process finished with exit code 0

Using A for-each loop:

In this methodology, we utilize a for-each loop to iterate over the list and add every element to the sum variable.

void main() {
  final numbers = [6, 12, 18, 24, 30];
  var sum = 0;
  numbers.forEach((number) {
    sum += number;
  });
  print(sum);
}

When we run the application, we ought to get the screen’s output like the Console Output on the underneath screen.

90

Process finished with exit code 0

Conclusion:

In the article, I have explained the sum of a list of numbers in dart; you can modify this code according to your choice. This was a small introduction to the sum of a list of numbers in Dart User Interaction from my side, and it’s working using Flutter.

I hope this blog will provide you with sufficient information on Trying the Sum Of a List Of Numbers In the Dart of your projects. So please try it.

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