Programming in Dart: Fundamentals

Apr 26 2022 · Dart 2.15, DartPad, DartPad

Part 2: Introducing Collections & Null Safety

12. Challenge: Work with Lists

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Previous episode: 11. Operate on a List Next episode: 13. Understand Null Safety

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In the last episode, you learned about lists. Now its time to put your new found knowledge to the test. In this challenge, I want you to create a list called grades. The grades should be 82, 76, 88, and 92. I want you store those values in the list, then calculate the average of the values. Pause the video and give it a shot.

const grades = [82, 76, 88, 92];

var sum = grades[0] + grades[1] + grades[2] + grades[3];

var average = grades / 4;

print('the average is $average');

var sum = grades.first + grades[1] + grades[2] + grades[3];

var sum = grades.first + grades[1] + grades[2] + grades.last;

var average = sum / grades.length;