Python String Concatenation

Everyday scenario

Imagine you’re designing an invitation card. The system needs to print a message like:

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Dear Ali,  
You are invited to the Annual Science Fair at City Hall.

But instead of typing the whole message word-for-word every time, the program should join smaller pieces together: the person’s name, the event, and the location. That’s exactly what string concatenation does.

The main idea

String concatenation means joining two or more strings to form one longer string.

In Python, the simplest way is with the + operator:

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first_name = "Ali"
last_name = "Khan"
full_name = first_name + " " + last_name
print(full_name)

Output:

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Ali Khan

You can also use:

• f-strings → f"Hello {name}"
• .join() → " ".join(["Ali", "Khan"])

Why this matters

Look at our invitation card:

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Dear Ali,  
You are invited to the Annual Science Fair at City Hall.  

If we hardcoded this message, we’d have to rewrite it for every person. With concatenation, we can build the message by combining variables like guest_name, event, and venue.

✨ Quick recap

• Use + to join strings.
• Add " " (a space in quotes) if you want spaces between words.
• Concatenation works only with strings, numbers must be converted with str().

Try it in code

Let’s make a simple invitation:

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guest_name = "Ali"
event = "Annual Science Fair"
venue = "City Hall"

invitation = "Dear " + guest_name + ",\nYou are invited to the " + event + " at " + venue + "."
print(invitation)

Output:

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Dear Ali,
You are invited to the Annual Science Fair at City Hall.

Learn with AI

If you’re using an AI assistant, try this:

Prompt:
Write a Python program that asks for a guest’s name, event name, and location, then concatenates them into a formatted invitation message.

The AI will generate ready-to-use code for you.

Practice challenge

Great work! Let’s test your understanding.

Task

Create an invitation message for:

• Guest: Sara
• Event: Book Launch
• Venue: Central Library

The output should be:

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Dear Sara,
You are invited to the Book Launch at Central Library.

Solution

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guest_name = "Sara"
event = "Book Launch"
venue = "Central Library"

message = "Dear " + guest_name + ",\nYou are invited to the " + event + " at " + venue + "."
print(message)

Perfect! You’ve now learned how to join strings together in Python.