本文介绍了为什么我的函数输出打印出“无"?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
I just learned (am learning) how function parameters work in Python, and I started experimenting with it for no apparent reason, when this:
def jiskya(x, y):
if x > y:
print(y)
else:
print(x)
print(jiskya(2, 3))
gave the ouput:
>>>
2
None
Where did the None come from? And what is it?
解决方案
It's the return value of the function, which you print out. If there is no return statement (or just a return without an argument), an implicit return None is added to the end of a function.
You probably want to return the values in the function instead of printing them:
def jiskya(x, y):
if x > y:
return y
else:
return x
print(jiskya(2, 3))
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