String Concatenation – An Interactive Guide

Python has powerful built-in capabilities for string manipulation. That’s why web companies like Google love Python—it’s a perfect fit for the text-based web.

This guide shows you how to use string concatenation operators using multiple forms of education:

• Text
• Puzzle
• Video
• Exercise

Ready to learn string concatenation? Let’s get started!

A Textual Introduction to String Concatenation in Python

There are two basic string manipulation operators.

• The '+' operator concatenates two strings.
• The '*' operator concatenates a string to itself repeatedly.

Those two operators are exemplified in the following example:

>>> 'hello ' + 'world'
'hello world'
>>> 'hello ' * 3
'hello hello hello '

The standard arithmetic rules apply to these operators: multiplication first, then addition.

>>> 'hello ' + 'world' * 3
'hello worldworldworld'

Attention: Python’s string type is immutable—meaning that you cannot change an existing string. Instead, Python creates a new string as the result of the string concatenation operators * and +.

As a Python professional, you will find yourself using these operators on a daily basis.

👉 Note: Both operands of the string concatenation operation x + y need to be strings. If you try to append a Boolean to a String, for example, first convert the Boolean to a string.

Can You Solve This String Concatenation Python Puzzle?

print(3 * 'un' + 'ium')

What is the output of this code snippet?

You can evaluate whether you’ve solved the puzzle correctly, and test your coding skills on our Finxter.com puzzle app: Test your skills now!

Watch the Video About String Concatenation

I found this excellent video on YouTube:

Beginner Python Tutorial 20 - Concatenation

Polish Your Skills With This Interactive Shell Exercise About String Concatenation

Here’s a Python exercise. You have given two variables A and B with some string content. Create a short and concise Python statement based on string concatenation to generate the desired output:

Scroll down to see the solution…

Where to Go From Here?

Enough theory. Let’s get some practice!

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Solution Exercise

The solution is simple: the string concatenation expression 3*(A+B) generates the desired output!

A = 'old mcdonald had a farm\n'
B = 'yia-yia-yo\n'

print(3*(A+B))
'''
old mcdonald had a farm
yia-yia-yo
old mcdonald had a farm
yia-yia-yo
old mcdonald had a farm
yia-yia-yo
'''