[Tutor] Concatenation

[Mats Wichmann]

On 8/19/22 11:59, Joel Goldstick wrote:
> On Fri, Aug 19, 2022 at 1:46 PM Gibson Green via Tutor <tutor at python.org> wrote:
>>
>> How can I concatenation a string statement with an integer? For example: Congratulations, you are now 24 years old. Age variables was declared and converted to an integer.
>> I have:
>>   print ( ‘ Congratulations, you are now’ + age+ ‘ years old’)
>>
>> Had an error about concatenation between integer and strings . Please  help. Thanks.
>>
>> Gibson.
>>
>>
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> 
> There are lots of ways.  The most recent addition to python are
> f-strings.  This works:
> 
>>>> age = 5
>>>> print (f"my age isn't {age}")
> my age isn't 5

yes - in which the "formatted string literal" implicitly does the
conversion of the value of "age" into a string, since it knows that the
objective is to produce a string, something Python did not know was
intended in the original version.

That original version can also be forced:

print('Congratulations, you are now ' + str(age) + ' years old')

but that's kind of suboptimal, because then you have to remember that
something in that line needs to have a type conversion done, and write
it that way.  Why not let the language do the work for you when possible?