How do I include integers in a string in Python?

Question

import random q = random.randint(10, 100) w = random.randint(10, 100) e = (q, " * ", w) r = int(input(e))

This outputs (i.e):

>>> (60, ' * ', 24)

I tried following this post but I faced an error.

I want output to atleast look like:

>>> (60 * 24)

What I tried was doing

import random q = random.randint(10, 100) w = random.randint(10, 100) **e = (q + " * " + w)** r = int(input(e))

Which gave me the error.

which gave me the error What error? Please post the error text so we know what you mean. And does your code actually have the 2 stars at the beginning and end of the line like you have in the second example? — user99999
– user99999, Commented Nov 14, 2022 at 22:53
the problem is that you're trying to add an integer, a string and another integer together, which only works in javascript. What I think you want to do is either use fstrings, as suggested by Barnaby in his answer, or to convert the values into a string first with something like str(q) and str(w) before adding them together — not a tshirt
– not a tshirt, Commented Nov 14, 2022 at 22:54
@user99999 Yes, my bad. It was a dumb mistake and is solved now. And no I was trying to highlight the part I changed so it would be more obvious but it didn't work probably because it was already in code. — anaveragenoobie
– anaveragenoobie, Commented Nov 15, 2022 at 10:28
Does this answer your question? Format numbers to strings in Python — tevemadar
– tevemadar, Commented Nov 20, 2022 at 13:50

Temba · Accepted Answer · 2022-11-14 22:47:09Z

A great way to do this is with f-strings

e = f"{q} * {w}"

You just need to start your string with an f, then include any variables in curly braces {}

Tristan Bodding-Long · Accepted Answer · 2022-11-14 22:52:59Z

2

Your value e has mixed types. q and w are ints while the string is a string. Python prints the types in the tuple as their types. Those quotation marks are not in the values they see, they are a built-in helper in python's display

You will need to coerce all three into the same type to do something with them, eg

>>> eval(str(q) + ' * ' + str(w)) 1482

That's the low level pointer, but higher level I need to ask, what are you trying to do?

answered Nov 14, 2022 at 22:52

Tristan Bodding-Long

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4 Comments

Jovan V Over a year ago

This will get the job done here, but please be very careful when using eval. It can become a very sneaky security issue.

Ignatius Reilly Over a year ago

@JovanVuchkov this seems to be a safe case since the variables are just numbers created by the program. Anyway, I think eval is used here just to show that they can be operated as strings... maybe not the most intuitive example.

Tristan Bodding-Long Over a year ago

yeah I'd never encourage using eval in a program with user defined input. This is demonstrative of types while it's unclear what TC wants to do.

anaveragenoobie Over a year ago

Thanks for the solution @TristanBodding-Long ! I'm trying to make an app with randomized math problems.

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