def cent_to_fahr(cent):
print (cent / 5.0 * 9 + 32)
print (cent_to_fahr(20))
The output is this :
68.0
None
Why this output has None
?
I didn't get this result when I use just cent_to_fahr(20)
. Can I ask why it happens ?
def cent_to_fahr(cent):
return (cent / 5.0 * 9 + 32)
print (cent_to_fahr(20))
a function needs to return
a value to have an output other then None
To put it into context, let's try understand what causes each line of output you received:
68.0
is printed thanks to the contents of your function. This could be seen as the "end" of that computation's "life", that value/result is no longer available for further computations. None
is what the function returns , and in this case is also quite useless. Now that we understand that better, I would recommend adjusting the function to return the value computed.
def cent_to_fahr(cent):
return (cent / 5.0 * 9 + 32)
That way when the function is called (in context of further functions) it will return a value that that can be further processed (in this case with print()
):
>>>print(cent_to_fahr(20))
Which will print 68.0
.
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