无法将变量转换为整数(因为 if 语句？

Question

对不起，但是我正在为过去的纸质问题编写一个程序，以查找用户输入的号码是否为素数，然后循环。

问题是，我似乎无法将输入userno从if语句中的float转换为int。

任何帮助都将不胜感激

run = True
while run == True:
    userno = float(input("Please enter a number to check if it's a prime number."))
    if userno < 1:
        print ("The number entered was lower than 1, so can't be prime.")
    else:
        int(userno)                         #this doesn't seem to work
        for norange in range (2,userno):    #userno is still a float here
            if userno % norange == 0:
                print ("This is not a prime number, sorry.")
            else:
                print ("This is a prime number. :)")
    runagain = input ("Do you want to enter another number? Please enter 'yes' or 'no'.")
    if runagain == "no":
        run = False

Answer 1

int(userno)返回用户诺作为整数，但不会覆盖userno实际变量的值。

您需要使用userno = int(userno)