我最近开始学习Python，感谢您对此的回应。
我故意把**get_int（）和get_float（）的定义写得不同，因为我想了解如果我接受main（）**中的输入并在函数调用时传递该值会发生什么。

#!/usr/bin/env python3

def get_int(prompt, low, high):
    while True:
        #number = float(input(prompt))
        if prompt <= low or prompt > high:
            print("Entry should be greater than ", low, "and less than or equal to ", high)
        else:
            return prompt

def get_float(prompt, low, high):
    while True:
        number = float(input(prompt))
        if number <= low or number > high:
            print("Entry should be greater than ", low, "and less than or equal to ", high)
        else:
            return number    
        
def calculate_future_value(monthly_investment, yearly_interest, years):
    # convert yearly values to monthly values
    monthly_interest_rate = yearly_interest / 12 / 100
    months = years * 12

    # calculate future value
    future_value = 0.0
    for i in range(months):
        future_value += monthly_investment
        monthly_interest = future_value * monthly_interest_rate
        future_value += monthly_interest

    return future_value

def main():
    years = 0
    monthly_investment = 0.0
    yearly_interest_rate = 0.0
    choice = "y"
    while choice.lower() == "y":
        # get input from the user
        monthly_investment = get_float("Enter monthly investment: ", 0, 1000)
        yearly_interest_rate = get_float("Enter yearly interest rate: ", 0, 15)
        years = int(input("Enter number of years: "))
        years = get_int(years, 0, 15)

        # get and display future value
        future_value = calculate_future_value(
            monthly_investment, yearly_interest_rate, years)

        print(f"Future value:\t\t\t{round(future_value, 2)}")
        print()

        # see if the user wants to continue
        choice = input("Continue? (y/n): ")
        print()

    print("Bye!")
    
if __name__ == "__main__":
    main()

我只是在get_int（）上有问题。正如你所看到的，我传递了low=0和high=15。如果我输入的年份为0或16，那么它会显示“if”子句中指定的无限打印语句，但当我输入范围内的值时没有问题（见屏幕截图：https://drive.google.com/drive/u/0/folders/1w4-IhBveZQv0pSDygc1HexNFBDUDNE-B）。
我不完全确定是否可以直接在函数定义中使用函数参数而不给局部变量赋值。
如果确实允许，那么**get_int（）**中的“while”循环是否有错误？或者我是否在main（）本身中包含了while循环，在那里我接受int值？
先谢了！