← Python

String Concatenation

The + operator joins two strings end to end

What it does: Adding ' ' between strings inserts a space in the result. Variables holding strings can be concatenated with +. There's already a space inside 'Hi ' — it gets joined to 'there'. name holds 'Alice', so 'Hi ' + name is 'Hi ' + 'Alice' = 'Hi Alice'. The middle " " adds a space between Hello and World. With strings, + concatenates (joins) them end to end. city holds 'Melbourne' — variables are replaced by their value. No spaces inside either string — + joins them directly.

Common mistakes: Line 3 is missing the + operator. Use: first + second. Line 2 uses Name with a capital N. Python is case-sensitive. Use: name.

Class: _____________________ · Name: _____________________ · Date: _________

Free printable worksheet with full answer key — or add this module to a journey and assign it to your class.

🖨 Print Worksheet and Answer key of String Concatenation (PDF)

Take this worksheet further — free with Cloodit

Each concept is reinforced from every angle — learned, then applied, then tested.

Learning

Duo

What is "Hello" + "World"?

Hello WorldHelloWorld

Matches

❌ 'Hello' + 5

↓

Error: str + int not allowed

Applying

Meanings

Term

"Hello" + "World"

Meaning

Concatenation joins strings with + but no space is added.

Practice

name = "Alice"

Testing

Gaps

result = "Hello" "World"

Check Answer

Spots

2second = "World"

3result = first second

Cloodit turns curriculum-aligned coding content into journeys students work through one biome at a time.

Students earn collectable badges

Over 100 of them, across seven natural biomes.

Study Buddy

Students build a real study resource

Turns their work into revision material ready for Flash Cards and Exam study.

Diamond Dash — one of Cloodit's live, competitive Sprint games

Students lock in with Sprints

Live, competitive practice for the start of the lesson or a teacher-led lesson finisher.

A Cloodit certificate of achievement, ready to personalise and print

Custom printable certificates

Honour your top performers, or encourage a student who's trying hard — ready to print in seconds.

Teach this with your class →

Quick Questions

1. What is "Hello" + "World"?

A. Hello World

B. HelloWorld ✓

+ joins strings exactly as they are — no space is added between them

2. What is "Hi " + "there"?

A. Hi there ✓

B. Hithere

There's already a space inside 'Hi ' — it gets joined to 'there'

3. After name = "Alice", what is "Hi " + name?

A. Hi Alice ✓

B. Hi name

name holds 'Alice', so 'Hi ' + name is 'Hi ' + 'Alice' = 'Hi Alice'

4. What is "Good" + "bye"?

A. Good bye

B. Goodbye ✓

+ joins strings with no gap — there's no space inside either string

5. What is "Hello" + " " + "World"?

A. Hello World ✓

B. HelloWorld

The middle " " adds a space between Hello and World

Match the Pairs

'Hello' + 5 → Error: str + int not allowed

name = 'Ali' print('Hi' + name) → Error: Missing space

'Hello' + ' ' + 'World' → Valid: Hello World

greeting = 'Hi ' result = greeting + 'Bob' → Ok: Concatenate variables

print('cat' + 'nap') → Output: catnap

a = 'Hot' b = 'Dog' print(a + b) → Output: HotDog

Key Term

"Hello" + "World"

Concatenation joins strings with + but no space is added.~~"Hello" + " " + "World"

Fill in the Blanks

1. result = "Hello" + "World"

2. name = "Alice" message = "Hi " + name print(message)

3. greeting = "Good" + " " + "morning"

4. first = "Bob" last = "Smith" fullname = first + " " + last

5. city = "Melbourne" sentence = "I live in " + city print(sentence)

Spot the Error

Question 1

A first = "Hello"

B second = "World"

C result = first second

D print(result)

Line C — Line 3 is missing the + operator. Use: first + second

Question 2

A name = "Bob"

B greeting = "Hi " + Name

C print(greeting)

Line B — Line 2 uses Name with a capital N. Python is case-sensitive. Use: name

Question 3

A fruit = "apple"

B count = "3"

C msg = "I have " + count + fruit

D print(msg)

Line C — Line 3 is missing a space before fruit. Use: count + " " + fruit

Question 4

A city = "Melbourne"

B country = "Australia"

C location = city + , + country

D print(location)

Line C — Line 3 has a comma without quotes. Use: city + ", " + country

Question 5

A word = "Hello"

B sentence = word + " " + "World"

C print(Sentence)

Line C — Line 3 uses Sentence with a capital S. Python is case-sensitive. Use: print(sentence)

For Teachers

Create a free class, add this module to a journey, and track who's stuck.

Create a free teacher account →

No credit card. No setup fee. Make a class and invite students in under three minutes.

For Students

Practice this topic interactively, track progress, and unlock badges.

Start Learning Free →

Have a class code?