Python String Concatenation
In this tutorial of Python String Concatenation, Python strings can be appended or joined through a process called concatenation were various methods some are as easy as using placeholders like {} braces and for more control functions comes to rescue.
Post Update Timeline
Updated on: 13-07-2020
Added new topics such as Chaining strings, Concatenation using modulus operator and use of “f” strings in Python
Chaining of string using join() method
The join() the method takes a list as a parameter and returns a single concatenated string.
a = "Welcome" b = "to python" c = "programming" string1 = ' ' print(string1.join([a,b,c])) # PYTHON OUTPUT Welcome to python programming # or l = ["Welcome", "to python", "programming"] string2 = ' '; print(string2.join(l)) # PYTHON OUTPUT Welcome to python programming
In the above example, each item of the list is appended with the existing item in the string and also explained using another example below.
Another example using the join() method for concatenation strings
my_list = ["Python", "Django", "Django Queryset"] string = '-->'; print(string.join(my_list)) # PYTHON OUTPUT Python-->Django-->Django Queryset
Other ways of string concatenation with examples.
Note
Strings can be repeated by this `*` asterisk operator
Example: Using asterisk operator to multiple strings
x = 3*'hey-' print(x) #PYTHON OUTPUT hey-hey-hey-
Using this addition operator for string concatenation
x = 3*'hey-'+' new string joined' print(x) #PYTHON OUTPUT hey-hey-hey- new string joined
Concatenating Numbers and Strings together
Example
x = 'John has scored '+72+' runs in '+4+' overs' print(x) #PYTHON ERROR OUTPUT TypeError: Can't convert 'int' object to str implicitly x = 'John has scored '+str(72)+' runs in '+str(4)+' overs' print(x) #PYTHON OUTPUT John has scored 72 runs in 4 overs runs = 70 overs = 4 x = 'John has scored '+str(runs)+' runs in '+str(overs)+' overs' #PYTHON OUTPUT John has scored 70 runs in 4 overs
Note
Although using addition operators is an old way of concatenation you can still use it. But it variable is numeric than wrap it inside the str() function.
Combine Multiple Strings
Example
string = ('This is string 1' 'This is string 2' 'This is string 3')
print(string)
#PYTHON OUTPUT
This is string 1 This is string 2 This is string 3
Concatenation using the Modulus operator
Although, there are other methods this one provides a simple approach as a result you may also find it easier.
string1 = 'Jake has won $' #type string
price = 100 #type int
string2 = ' price in swimming competition' #type string
print('%s%d%s'%(string1,price,string2))
#PYTHON OUTPUT
Jake has won $100 price in swimming competition
Using format() method
For instance, if your looking for other ways than format() function helps you in easily putting strings together as shown in below snippet.
string1 = 'Jake has won $' #type string
price = 100 #type int
string2 = ' price in swimming competition' #type string
print('{}{}{}'.format(string1,price,string2))
#PYTHON OUTPUT
Jake has won $100 price in swimming competition
#OR
string1 = 'Jake has won $' #type string
price = 100 #type int
string2 = ' price in swimming competition' #type string
print('{string1}{price}{string2}'.format(string1=string1,price=price,string2=string2))
#PYTHON OUTPUT
Jake has won $100 price in swimming competition
#OR
string1 = 'Jake has won $' #type string
price = 100 #type int
string2 = ' price in swimming competition' #type string
print('{string1}{price}{string2}'.format(string1='Jake has won $',price=100,string2=' price in swimming competition'))
#PYTHON OUTPUT
Jake has won $100 price in swimming competition
Above all, snippets are those various approaches of using format function.
Using f strings
This feature was introduced in Python Version 3.6. Therefore, python developers recognized its capability of quick string formation.
string1 = 'Jake has won $' #type string
price = 100 #type int
string2 = ' price in swimming competition' #type string
print(f'{string1}{price}{string2}')
#PYTHON OUTPUT
Jake has won $100 price in swimming competition
Conclusion
In conclusion, of this post on Python String Concatenation, you now have learned to use them in a much better way and Therefore we have come to the end of this post. In addition, for doubts regarding programming, you can comment or contact us you’ll have our full support.
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