print("enter start() to start the program")
def start():
print("This script converts GBP into any currency based on the exchange rate...")
print(" ") #enters a line
exchangeRate = int(input("Enter the exchange rate (Eg: 0.80)"))
print("how much would you like to convert???")
gpb = int(input())
print(gpb*exchangeRate)
十进制值和输入£1它总是返回0我怎么如果我把汇率在0.81打印在python