If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.
The aim is to find out how many letters are used if all the numbers from 1 to n (e.g. 1000) inclusive were written out in words.
NOTE: Do not include spaces or hyphens. For example 342 (three hundred and forty-two) contains 23 letters and 115 (one hundred and fifteen) contains 20 letters. The use of "and" when writing out numbers is in compliance with British usage.
Information at Project Euler 017
Getting Started
Enter a whole number between 1 and 2000000 in the input field and click on the Submit Button. You will see the number you have entered as well as the number of letters used to write the numbers from 1 to that number, unless you have made an invalid input. For example, if you entered 5, you would expect to get 19 letters used to write the numbers from 1 to 5. Click on the Reset Button to clear this information or to start again.
User Stories
As a user, I expect to get an error message if I do any of:
- Not enter anything in the input field
- Entering a number less than 1 or greater than 2000000
- Entering text other than a number
- Entering a number, but it is not an integer
As a user, I expect the function numberLetterCounts(5) to return a number.
As a user, I expect the function numberLetterCounts(5) to return 19.
As a user, I expect the function numberLetterCounts(150) to return 1903.
As a user, I expect the function numberLetterCounts(1000) to return 21124.
Information Architecture
The function numberLetterCounts(limit) returns a number, where limit is a number between 1 and 2000000.
Allows the user to enter a number as well as getting the number of letters used to write the numbers from 1 to that number. Performs checks on valid user input. If the input is invalid, an error message is displayed.
Uses HTML5, CSS3, JavaScript, Bootstrap 5.2.0-Beta1 and Google Fonts.
Ensure all user stories have been met.
Deployed on GitHub Pages at the main branch.
Written by me.