#!/bin/bash

usr=$RANDOM
num=$RANDOM

clear

compare()
{
    if [[ "$usr" -ne "$num" ]]; then

        if [[ "$usr" -lt "$num" ]]; then
            echo "Больше"
            echo
            return 1
        else
            echo "Меньше"
            echo
            return 1
        fi

        return 0
    fi
}

echo "Первая догадка:"
while [ "$usr" -ne "$num" ]; do
    read usr
    compare && echo "Правильно!"
done