我的程序没有返回值？

Question

当我返回一个值时，怎么不输出它？它可能非常简单......顺便说一句，我目前仍在学习Python。我正在使用Python 3.x。

def convert(operation, temp):
    newTemp = 0
    if (operation is 'F' or operation is 'f'):
        newTemp = (9/5) * (temp + 32)
        return newTemp
    if (operation is 'C' or operation is 'c'):
        newTemp = (5/9) * (temp - 32)
        return newTemp

print ("What operation would you like to convert to? ")
op = input("(F)ahrenheit or (C)elsius: ")
print ()
temp = input("What is the temperature : ")
NewTemp = int(temp)
convert(op, NewTemp)

由于

Answer 1

你从未告诉它打印结果。试试这个：

print(convert(op, NewTemp))

Answer 2

您需要print convert(op, NewTemp)返回的值：

print(convert(op, NewTemp))