Different ways to append a string in Python

This python tutorial help to learn different ways to append a string in python. There are various ways, such as using the += operator, join() function, f-strings, and appending the strings with space.

As we know, The strings in Python are immutable objects. You can not modify the original string, but you can always return a new string. Let’s discuss the concatenation of strings and how to append one string to another string.

You can append a string using the below ways:

• Using + Operator
• Using string.join() method
• Using Python f-strings

Python append String

Python uses the += operator to attach one string to another. A string is appended to another with the Python += operator. The final value is then assigned to a variable after adding the two initial values.

Python append string Using + Operator

We can concatenate strings by using +=(plus equal operator) to concatenate two strings, a new string is created without a change of the original string.

#app.py

fname = "Tim"
mname = "Tom"

# printing fname string
print("The first name: " + str(fname))

# printing mname add string
print("The middle name : " + str(mname))

# Using += operator adding one string to another
fname += mname

# print result
print("The concatenated string is: " + fname)

Output:

The first name: Tim
The middle name : Tom
The concatenated string is: TimTom

How To Append string multiple times in Python

You can append strings multiple times using + operator. Let’s create a user-defined function that will append the string n times to the original string.

# app.py

str = 'Tim'


def string_append(s, n):
    op = ''
    i = 0
    while i < 5:
        op += s + ','
        i = i + 1
    return op


jstring = string_append(str, 5)
print(jstring)

Output:

Tim-Tim-Tim-Tim-Tim

String join() method to append a string

Python’s string join() method can be used to append strings. You must make a list and add the strings to it to accomplish that. To combine them and produce the final string, use the string join() function.

#app.py

fname = "Tim"
mname = "Tom"

# printing fname string
print("The first name: " + str(fname))

# printing mname add string
print("The middle name : " + str(mname))

listOfStrings = [fname, mname]

finalString = "".join(listOfStrings)

# print result
print("The concatenated string is: " + fname)

Output:

The first name: Tim
The middle name : Tom
The concatenated string is: TimTom

Python append String Using f-strings

Python f-strings, is a new method for formatting strings, It’s available as of version python 3.6. In comparison to other formatting methods, they are not only faster but also more readable.

#app.py

fname = "Tim"
mname = "Tom"

# printing fname string
print("The first name: " + str(fname))

# printing mname add string
print("The middle name : " + str(mname))

finalString = f"{fname}{mname}"

# print result
print("The concatenated string is: " + fname)

Output:

The first name: Tim
The middle name : Tom
The concatenated string is: TimTom