Summary of 7 ways to connect strings in Python

Python provides multiple ways to concatenate one or more strings together. Since Python strings are immutable, a new string will always be generated after string concatenation.

Simple way to connect strings

To concatenate two or more strings, just place them next to each other.

s = 'Hello' 'World'
print(s) #Output: HelloWorld

Note that this method does not work with string variables.

Use the "+" operator to connect strings

A direct way to concatenate multiple strings into one string is to use the "+" operator.

s ='Hello' + 'World'
print(s)

The "+" operator is suitable for strings and string variables.

s1 = 'Hello'
s2 = s1 + 'World'
print(s2)

Use the "+=" operator to connect strings

Similar to the "+" operator, multiple strings can be concatenated into one using the "+=" operator.

s = 'Hello'
s += 'World'
print(s)

Use the join() method to connect strings

The join() method allows concatenation of a string list into a string:

s1 = 'Hello'
s2 = 'World'
s3 = ''.join([s1, s2])
print(s3)

The join() method also allows specifying a delimiter when connecting a string.

s1 = 'Hello'
s2 = 'World'
s3 = ' '.join([s1, s2])
print(s3) #Output: Hello World

In this example, the join() method is used to concatenate a string separated by a space.

The following example uses this method to separate strings by commas.

s1, s2, s3 = 'Python', 'Hello', 'World'
s = ','.join([s1, s2, s3])
print(s) # Output: Python, Hello, World

Use % to connect string

The String object has a built-in % operator that can be used to format strings, which can be used to concatenate strings.

s1, s2, s3 = 'Python', 'Hello', 'World'
s = '%s %s %s' % (s1, s2, s3)
print(s)#Output: Python Hello World

Use the format() method to connect strings

You can use the format() method to concatenate multiple strings into one string.

s1, s2, s3 = 'Python', 'Hello', 'World'
s = '{} {} {}'.format(s1, s2, s3)
print(s)

Use f-strings to connect strings

Python 3.6 introduces f-strings, allowing strings to be formatted in a more concise and elegant way. You can use f-strings to concatenate multiple strings into one string.

s1, s2, s3 = 'Python', 'Hello', 'World'
s = f'{s1} {s2} {s3}'
print(s)

Which string concatenation method is easier? Although there are several ways to concatenate strings in Python, it is recommended to use the join() method, the "+" operator, and f-strings to concatenate strings.

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