? Python String Concatenation

⚡ Quick Overview

String concatenation means combining two or more strings together to form a single string. In Python, you can concatenate strings in several ways:

• Using the + operator.
• Using f-strings (formatted string literals).
• Using the format() method.
• Using join() to join items from an iterable like a list.

? Key Concepts

• Concatenation creates a new string from existing strings.
• Python strings are immutable, so each concatenation builds a new string.
• All parts must be strings; use str() if you want to combine numbers with text.
• f-strings and format() help embed variables inside strings cleanly.
• join() is efficient when combining many strings from a list or other iterable.

? Syntax and Theory

➕ Using the + Operator

The simplest way to concatenate strings is with the + operator. You can also add spaces manually where needed.

? Using f-Strings

f-Strings (available from Python 3.6+) are written by prefixing a string with f and placing variables or expressions inside { }. They are very readable and efficient.

⚙️ Using format()

The format() method replaces { } placeholders inside a string with provided values in order.

? Using join() for Lists

The join() method is called on a separator string (like " ") and takes an iterable of strings (like a list) to combine them into one string.

? Code Examples

➕ Example: Concatenation with +

first = "Hello"
second = "World"
result = first + " " + second
print(result)  # Hello World

? Example: Using f-Strings (Recommended)

name = "Alice"
age = 25
message = f"My name is {name} and I am {age} years old."
print(message)

⚙️ Example: Using format()

name = "Alice"
age = 25
message = "My name is {} and I am {} years old.".format(name, age)
print(message)

? Example: Joining Strings from a List

words = ["Python", "is", "awesome"]
sentence = " ".join(words)
print(sentence)  # Python is awesome

? Live Output and Explanation