[Tutor] Why do I get "None"?

[Alan Gauld]

On 26/01/2021 04:49, H K wrote:
> def greeting_2(name):
>     print("Hello " + name)

Every time you define a function without an explicit return
statement Python implicitly returns None.

> example = greeting_2("Christine")

The line above prints he greeting inside the function

> print(example)

This line prints the return value which is None.

> This gives the value:
> Hello Christine

>From inside the function

> None

>From your print(example)

This confusion could have been avoided by *returning*
the greeting as a string rather than printing it inside
the function:

def greeting_3(name):
    return "Hello" + name

example = greeting_3("Christine")
print(example)

This is considered better practice than embedding
print statements inside functions that create data.
Generate the data inside the function and return it.
Then print the result of the function separately.


-- 
Alan G
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