Quiz in bash

quiz.sh

#!/bin/bash
# Try to guess number

# Function that generates numbers based on range
function random {
        num=$(($RANDOM%$1+1))
        echo $num
}

function noargs {
        echo "Error: Invalid flag specified";
}
# Number of guesses
guesses=3
# Range of random number
range=10
# Check for special flags
while getopts :g:r: option; do
        case option in
                g) guesses=$OPTARG;;
                r) range=$OPTARG;;
                *)
                        noargs
                        exit 1;;
        esac
done
# Generate random number
num=$(random $range)
# The number input
read -p "Guess number 1-$range: " inp
while [[ inp -ne num && --guesses -gt 0 ]]; do
        read -p "Wrong number, you have $guesses tries left: " inp
done
# Check if the user got it
if [[ inp -eq num ]]; then
        echo "Congratulations! You have won, number was: $num"
else
        echo "Oh no! You have lost the game! Number was: $num"
fi