How to resolve the algorithm Eban numbers step by step in the Tailspin programming language

Published on 12 May 2024 09:40 PM
#Tailspin

How to resolve the algorithm Eban numbers step by step in the Tailspin programming language

Table of Contents

Problem Statement

An   eban   number is a number that has no letter   e   in it when the number is spelled in English. Or more literally,   spelled numbers that contain the letter   e   are banned.

The American version of spelling numbers will be used here   (as opposed to the British). 2,000,000,000   is two billion,   not   two milliard.

Only numbers less than   one sextillion   (1021)   will be considered in/for this task. This will allow optimizations to be used.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Eban numbers step by step in the Tailspin programming language

Source code in the tailspin programming language

templates isEban
  def number: $;
  '$;' -> \(<'([246]|[3456][0246])(0[03456][0246])*'> $ !\) -> $number !
end isEban

templates isEban
  def number: $;
  $ -> \(<1..> $!\) -> #
  when <=0> do $number !
  when )>)> do $ ~/ 1000 -> #
end isEban

def small: [1..1000 -> isEban];
$small -> !OUT::write
'
There are $small::length; eban numbers up to and including 1000

' -> !OUT::write

def next: [1000..4000 -> isEban];
$next -> !OUT::write
'
There are $next::length; eban numbers between 1000 and 4000 (inclusive)

' -> !OUT::write
'
There are $:[1..10000 -> isEban] -> $::length; eban numbers up to and including 10 000

' -> !OUT::write
'
There are $:[1..100000 -> isEban] -> $::length; eban numbers up to and including 100 000

' -> !OUT::write
'
There are $:[1..1000000 -> isEban] -> $::length; eban numbers up to and including 1 000 000

' -> !OUT::write
'
There are $:[1..10000000 -> isEban] -> $::length; eban numbers up to and including 10 000 000

' -> !OUT::write

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