Problem 324. 7 segment LED display

Created by Alan Chalker
Appears in Number Manipulation I

Difficulty:Rate

Solve Later
Add To GroupÃ‚

Given a whole number, output how many segments would be lit up to display it on a 7 segment LED display (see Wikipedia: http://en.wikipedia.org/wiki/Seven-segment_display)
Examples:
1 -> 2
34 -> 9

Solve

Solution Stats

647 Solutions
274 Solvers

Last Solution submitted on Jul 21, 2025

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

TurqoiseInt on 22 Jan 2018

How to pass test 15, I see only integer converted to float in my function, then back to the int64 is too late, I have lost last digit.

Hannes on 13 Feb 2018

In addition to the remark of TurqoiseInt, y_correct seems to be wrong for test 15. I guess y_correct = 86 assumes x = 12345678987654000.

Sergey Kasyanov on 11 Apr 2018

Test 15 is wrong. True number of segment in number 12345678987654321 is 80. If last digit is losted then true number become 84. In this test correct answer is 86. Maybe it is misprint?

Solution Comments

Show comments

Problem Recent Solvers274

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 324. 7 segment LED display

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers274

Suggested Problems

More from this Author39

Problem Tags

Community Treasure Hunt

Problem 324. 7 segment LED display

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers274

Suggested Problems

More from this Author39

Problem Tags

Community Treasure Hunt

Players