74 lines
1.6 KiB
Markdown
74 lines
1.6 KiB
Markdown
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# Say
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Welcome to Say on Exercism's Elixir Track.
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If you need help running the tests or submitting your code, check out `HELP.md`.
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## Instructions
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Given a number from 0 to 999,999,999,999, spell out that number in English.
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## Step 1
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Handle the basic case of 0 through 99.
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If the input to the program is `22`, then the output should be `'twenty-two'`.
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Your program should complain loudly if given a number outside the blessed range.
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Some good test cases for this program are:
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- 0
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- 14
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- 50
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- 98
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- -1
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- 100
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### Extension
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If you're on a Mac, shell out to Mac OS X's `say` program to talk out loud.
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If you're on Linux or Windows, eSpeakNG may be available with the command `espeak`.
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## Step 2
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Implement breaking a number up into chunks of thousands.
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So `1234567890` should yield a list like 1, 234, 567, and 890, while the far simpler `1000` should yield just 1 and 0.
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## Step 3
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Now handle inserting the appropriate scale word between those chunks.
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So `1234567890` should yield `'1 billion 234 million 567 thousand 890'`
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The program must also report any values that are out of range.
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It's fine to stop at "trillion".
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## Step 4
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Put it all together to get nothing but plain English.
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`12345` should give `twelve thousand three hundred forty-five`.
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The program must also report any values that are out of range.
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## Source
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### Created by
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- @zporter
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### Contributed to by
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- @aifrak
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- @amencarini
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- @angelikatyborska
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- @Cohen-Carlisle
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- @devonestes
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- @neenjaw
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- @parkerl
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- @sotojuan
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### Based on
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A variation on the JavaRanch CattleDrive, Assignment 4 - https://coderanch.com/wiki/718804
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