Concatenating string and integer in Python [duplicate]

No string formatting:

>> print 'Foo',0
Foo 0

String formatting, using the new-style .format() method (with the defaults .format() provides):

 '{}{}'.format(s, i)

Or the older, but "still sticking around", %-formatting:

 '%s%d' %(s, i)

In both examples above there's no space between the two items concatenated. If space is needed, it can simply be added in the format strings.

These provide a lot of control and flexibility about how to concatenate items, the space between them etc. For details about format specifications see this.

Python is an interesting language in that while there is usually one (or two) "obvious" ways to accomplish any given task, flexibility still exists.

s = "string"
i = 0

print (s + repr(i))

The above code snippet is written in Python 3 syntax, but the parentheses after print were always allowed (optional) until version 3 made them mandatory.

In Python 3.6 and newer, you can format it just like this:

new_string = f'{s} {i}'
print(new_string)

Or just:

print(f'{s} {i}')

The format() method can be used to concatenate a string and an integer:

print(s + "{}".format(i))

You can use the an f-string too!

s = "string"
i = 95
print(f"{s}{i}")

If you only want to print, you can do this:

print(s, i)

Let's assume you want to concatenate a string and an integer in a situation like this:

for i in range(1, 11):
   string = "string" + i

And you are getting a type or concatenation error.

The best way to go about it is to do something like this:

for i in range(1, 11):
   print("string", i)

This will give you concatenated results, like string 1, string 2, string 3, etc.