fibonacci.py

print('FIBONACCI - GENERATOR')
print('tippe jederzeit\n - exit - um zu beenden...')

def fibo(user_input):
    x = 0
    y = 1
    i = 0
    uin = user_input
    for each in range(int(uin)):
        i = i+1
        if i == uin:
            print(x)
        x = y-x
        y = x+y

while True:
    user_input = input('gib an welche stelle ausgegeben wird:\n')
    if user_input == 'exit':
        exit()
    else:
        fibo(user_input)