@cassidoo's interview question from April 2, 2023

countSelfChars.sh

#!/usr/bin/env bash
set -eu -o pipefail

# Define function to convert a number to English words
function num_to_words {
  local ones=( '' one two three four five six seven eight nine )
  local tens=( '' '' twenty thirty forty fifty sixty seventy eighty ninety )
  local specials=( ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen )
  local num=$1

  # Handle numbers greater than or equal to 1000
  if [[ $num -ge 1000 ]]; then
    local thousands=$(( $num / 1000 ))
    num=$(( $num % 1000 ))
    echo -n "$(num_to_words $thousands) thousand "
  fi

  # Handle numbers between 100 and 999
  if [[ $num -ge 100 ]]; then
    local hundreds=$(( $num / 100 ))
    num=$(( $num % 100 ))
    echo -n "${ones[$hundreds]} hundred "
    if [[ $num -gt 0 ]]; then
      echo -n "and "
    fi
  fi

  # Handle numbers between 20 and 99
  if [[ $num -ge 20 ]]; then
    local tens_place=$(( $num / 10 ))
    num=$(( $num % 10 ))
    echo -n "${tens[$tens_place]} "
  fi

  # Handle numbers between 10 and 19
  if [[ $num -ge 10 && $num -lt 20 ]]; then
    local specials_place=$(( $num % 10 ))
    echo -n "${specials[$specials_place]} "
    num=0
  fi

  # Handle numbers between 0 and 9
  if [[ $num -lt 10 ]]; then
    echo -n "${ones[$num]} "
  fi
}

# Call the function with this script as the argument
num_to_words $( wc -m $0 )

MONTASIO:~ andrewrich$ wc -m ~/Documents/scripts/cassidoo/countSelfChars.sh 
    1354 /Users/andrewrich/Documents/scripts/cassidoo/countSelfChars.sh
MONTASIO:~ andrewrich$ ~/Documents/scripts/cassidoo/countSelfChars.sh 
one  thousand three hundred and fifty four