我正在尝试自学 python 并编写了一个基本程序来添加第 n 个数字的总和。当我给出一个整数输入时，它执行得很好，但在非整数输入上，抛出一个错误NameError: name 'add_it_up' is not defined。我的程序写在下面。

try:
    x = int(input('Enter the number upto which you want to add :'))

    try:

        def add_it_up(x):
            sum = 0
            for num in range(x + 1):
                sum = sum + num
            print(sum)
    except TypeError:
        print("Sorry we are facing a problem")
except ValueError:
    print("Please enter an intiger value only")

add_it_up(x)

回答

def add_it_up(x):
        sum = 0
        for num in range(x + 1):
            sum = sum + num
        print(sum)

try: 
    x = int(input('Enter the number upto which you want to add :'))

    try:   
        add_it_up(x)
    except TypeError:
        print("Sorry we are facing a problem")

except ValueError: 
    print("Please enter an intiger value only")