the guessing game

import random
trys = 0
mode= input('chose your mode.\n easy/medium/hard\n')
if mode == 'hard':
     trys = 3
elif mode == 'medium':
     trys = 5
elif mode == 'easy':
     trys = 10
while trys > 0:
    ran_num = random.randint(1,100)
    guess_num =int(input('guess the random number!-'))
    if ran_num > guess_num:
        print('guess again, number too low!')
        trys-=1
    elif ran_num < guess_num:
        print('guess again, number too high!')
        trys-=1
    elif ran_num == guess_num:
        print('you guessed the right number!')
    else:
        print('ERROR ocured, try again')
    if trys == 0:
        print('game over the answer was',ran_num)
        break