當 int 輸入為空/空白時如何中斷循環？

Question

當用戶輸入空/空白並且無法弄清楚時，我希望循環中斷。 只是給我價值錯誤。

a = 0
x = 0
while True:
    num1 = int(input("Give number: "))
    if num1 == "":
        break
    x += num1
    a += 1
print("Numbers Given: ", a)
print("Sum of numbers: ",x)

Answer 1

你可以試試這個try-except：

a = 0
x = 0
while True:
    try: 
        num1 = int(input("Give number: "))
    except ValueError as err:
        print("Empty `number`")
        break
    x += num1
    a += 1
print("Numbers Given: ", a)
print("Sum of numbers: ",x)

Output：

Give number: 2
Give number: 3
Give number: 
Empty `number`
Numbers Given:  2
Sum of numbers:  5

Answer 2

a = 0
x = 0
while True:
    num1 = input("Give number: ")
    if num1 == "":
        break
    x += int(num1)
    a += 1
print("Numbers Given: ", a)
print("Sum of numbers: ",x)