20 True or False Questions

import random

print("****************************************************************************************************")
print("****************************************************************************************************")

# 1. Intro
length = 20               # The SIZE of the ANSWER
iterations = 10           # Poses fores tha ginei epanalipsi tou idiou senariou gia na exw sygkentrwtika apotelesmata (10000 poly kali proseggisi)
print("Imagine you are given a test WITH 20 QUESTIONS (True or False), but you don't know ANY answer to them.")
print("So, you decide to give your answers in a random way. You reply true or false RANDOMLY.")
print()
print("So, you have to write down in a row a string (with length = 20) of 'T' or 'F' like this one: TTFFTFTFTFFFTTFFTTFT:")
answer = input("Write down your answer: ")
while len(answer) != length:
    print("You gave me a string made of " + str(len(answer)) + " letters and not " + str(length) + " letters")
    answer = input("Write down your answer: ")

print()
####    Iterations    #### Apla kanw ena for pou tha trexei to idio senario kapoies fores gia na min kanw synexeia terminate programme
correctLettersInAllIterations = 0
for epanalipsi in range(iterations):
    print("Simulation no" + str(epanalipsi + 1) + ": ")

    # 2. The computer creates its RANDOM answer and then its gonna be a comparison betwwen the 2 answers
    PCAnswer = []
    for i in range(length):
        r = random.randint(0, 1)
        if r == 0:
            PCAnswer.append('F')                # If the generated number is 0 ---> I append the letter 'F' in the PCAnswer
        else:
            PCAnswer.append('T')


    # 3. Convert the user's answer in upperCase for safety
    answer = answer.upper()


    # 4. Compare the 2 answers (remember that answer = string and PCAnswer = list)
    correctLetters = 0
    for i in range(length):
        if answer[i] == PCAnswer[i]:
            correctLetters += 1

    print("******************************************")
    correctLettersInAllIterations += correctLetters
    print("Your answer: " + answer)
    print("PC's answer: " + ''.join(map(str, PCAnswer)))
    print("PC found " + str(correctLetters) + "/" + str(length) + " answers.")
    print()

print("**************")
print("Average correct letters: " + str(correctLettersInAllIterations/iterations))
print("**************")