gistfile1.txt

#!/bin/bash

min_number=1
max_number=10

my_number=$(( RANDOM % max_number + min_number ))

read -p "Guess a number between $min_number and $max_number >>> " number_guess

case $number_guess in
    '' | *[!0123456789]*)
    printf '%s\n' "$0: $var: invalid digit" >&2; exit 1;;
esac

echo "My number is $my_number. You guessed $number_guess."

if ((number_guess == my_number)); then
    echo "Congratulations! You guessed correctly!"
else
    echo "Sorry, better luck next time!" >&2
    exit 1
fi