File: hello_timed

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bash-unit 2.3.2-1
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#!/usr/bin/env bash

declare -F current_hour >/dev/null || current_hour() {
  date +%H
}

if (( "$(current_hour)" < 11 ))
then
  echo "Good morning World!"
else
  if (( "$(current_hour)" > 17 ))
  then
    echo "Good evening World!"
  else
    echo "Hello World!"
  fi
fi