Why is this printing 'None' in the output?

Question

I have defined a function as follows:

def lyrics():
    print "The very first line"
print lyrics()

However why does the output return None:

The very first line
None

Asked By: def_0101

||

Source

Answer 1

Because there are two print statements. First is inside function and second is outside function. When a function doesn’t return anything, it implicitly returns None.

Use return statement at end of function to return value.

e.g.:

Return None.

>>> def test1():
...    print "In function."
... 
>>> a = test1()
In function.
>>> print a
None
>>> 
>>> print test1()
In function.
None
>>> 
>>> test1()
In function.
>>>

Use return statement

>>> def test():
...   return "ACV"
... 
>>> print test()
ACV
>>> 
>>> a = test()
>>> print a
ACV
>>>

Answered By: Vivek Sable

Answer 2

Because of double print function. I suggest you to use return instead of print inside the function definition.

def lyrics():
    return "The very first line"
print(lyrics())

OR

def lyrics():
    print("The very first line")
lyrics()

Answered By: Avinash Raj

Why is this printing 'None' in the output?

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