在Python中返回外部函数错误 [英] Return outside function error in Python
问题描述
这是问题:
假设用户在Python中输入以下程序,则用户从键盘输入数字4。
pre $ n $ int $(input(输入一个正整数:))
将返回的值是什么?
(N> 0):
计数器=计数器* N
N = N - 1
返回计数器
然而,当我运行系统
时,我不断收到外部函数错误,我做错了什么?
Thanks!
您只能从函数内部返回,而不能从循环中返回。 b
$ b
看起来你的回报应该在while循环之外,并且你的完整代码应该放在一个函数中。
def func():
N = int(输入(输入正整数:))
计数器= 1
while(N> 0):
计数器=计数器* N
N - = 1
返回计数器#将这4个空格解除缩进到左侧。
print func()
如果这些代码不在函数内部,那么你完全不需要 return
。只需在 while循环
之外打印 counter
的值。
This is the problem: Given the following program in Python, suppose that the user enters the number 4 from the keyboard. What will be the value returned?
N = int(input("enter a positive integer:"))
counter = 1
while (N > 0):
counter = counter * N
N = N - 1
return counter
Yet I keep getting a outside function error when I run the system what am I doing wrong? Thanks!
You can only return from inside a function and not from a loop.
It seems like your return should be outside the while loop, and your complete code should be inside a function.
def func():
N = int(input("enter a positive integer:"))
counter = 1
while (N > 0):
counter = counter * N
N -= 1
return counter # de-indent this 4 spaces to the left.
print func()
And if those codes are not inside a function, then you don't need a return
at all. Just print the value of counter
outside the while loop
.
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