FizzBuzz.sh

#!/bin/sh

function main(){
  configure
  run
}

function configure(){
  echo 'いくつから？'
  read range_begin
  echo 'いくつまで？'
  read range_end
}

function run(){
  sequence=`seq $range_begin $range_end`
  for n in $sequence
  do
    let n_mod_3=n%3
    let n_mod_5=n%5
    if [ $n_mod_3 -eq 0 ]
    then 
      echo -n 'Fizz!'
    fi
    if [ $n_mod_5 -eq 0 ]
    then
      echo -n 'Buzz!'
    elif ! [ $n_mod_3 -eq 0 ]
    then
      echo -n $n
    fi
    echo
  done
}

main