Def problem, plz help, thank you

Question

celsius = int(input())
def conv(c):
print(9/5*c+32)
#your code goes here
fahrenheit = conv(celsius)
print(fahrenheit)
#may i ask why there is a none in the output??

Answer 1

because the `conv` function does not return a value, so by default it returns None every time is called.
To fix this just modify the line as: `return 9/5*c+32`

Answer 2

Because you directly print the value in the function and didn't return the value so on the last line it prints none
For correction instead of print function you can use return statement in function