何も入力されていないとき

Question

移動する前にユーザーが何かを入力するようにするには、何を追加する必要がありますか？

ループで再度入力するためのプロンプト

print() 
print("Question 2") 
print("What is the currency of Spain?") 
print() 
print("A Euro") 
print("B Dollar") 
print("C Yen") 
print("D Krona") 
answer = input("What is your choice: ").upper() 

while answer is none #keep asking 
if answer == "A": 
     print("Correct!") 
     score = score + 1 
else: 
     print("Sorry, the correct answer was A") 

Answer 1

：

print() 
print("Question 2") 
print("What is the currency of Spain?") 
print() 
print("A Euro") 
print("B Dollar") 
print("C Yen") 
print("D Krona") 

answer = input("What is your choice: ").upper() 

while answer == "": 
    answer = input("What is your choice: ").upper() 
if answer == "A": 
     print("Correct!") 
     score = score + 1 
     correct = True 
else: 
     print("Sorry, the correct answer was A")