如何解决“声明似乎无效”错误？

Question

The mission is to get the user to input some value if extra cash was spent to replace a capital good, but if no extra cash was spent, then I want the program to move on to the next line of code.

Where did I go wrong with my code?

print("Did you spend extra to replace a capital goods\n")

variableExpense = 'Yes'
variableExpense = 'No'

if variableExpense == 'Yes':
    variableExpense = input('How much did you spent: \n')
else:
    if variableExpense == 'No':
    print('print some statement.\n')

Answer 1

You are currently assigning variableExpense to the value Yes , then in the next line you set it to No , so the following statement if variableExpense == 'Yes' will never evaluate to true. Try it like this

print("Did you spend extra to replace a capital goods\n")

variableExpense = input("Yes or No: ")

if variableExpense.lower() == 'yes':
    extraSpent = input('How much did you spent: \n')
else:
    if variableExpense.lower() == 'no':
        print('print some statement.\n')