Python String join() Method

Last Updated : 1 Oct, 2026

join() method in Python is used to combine elements of an iterable into a single string. It places the specified separator between each element. It is commonly used with lists and tuples, but it can work with any iterable whose elements are strings.

Example: Here the elements of a list are joined using a space as the separator.

Python 
words = ["Python", "is", "easy"]

result = " ".join(words)

print(result)

Output
Python is easy

Explanation:

  • List contains three string elements.
  • " ".join(words) places a space between each element.
  • Resulting string is stored in result and printed.

Syntax

separator.join ( iterable )

Parameters:

  • separator: Its the string placed between the elements.
  • iterable: Contains the string needed to be joined.

Joining List

List of string can be joined using any required separator.

Python 
languages = ["Python", "Java", "C++"]

result = ", ".join(languages)

print(result)

Output
Python, Java, C++

Joining Tuple

join() also works with tuples containing strings.

Python 
items = ("Learn", "Python", "Fast")

result = " ".join(items)

print(result)

Output
Learn Python Fast

Joining Sets

They can also be passed to join(). However, sets are unordered, so the order of elements in the resulting string is not guaranteed.

Python 
items = {"Python", "Java", "C++"}

result = ", ".join(items)

print(result)

Output
C++, Java, Python

Joining Dictionary Keys

When a dictionary is passed directly to join(), Python iterates over its keys.

Python 
data = {
    "Name": 1,
    "Age": 2,
    "City": 3
}

result = "-".join(data)

print(result)

Output
Name-Age-City

Joining a Generator

It can work with generators because generators are iterables.

Python 
words = (word for word in ["Python", "is", "fun"])

result = " ".join(words)

print(result)

Output
Python is fun

Using Empty Separator

An empty string can be used as the separator when no character should appear between elements.

Python 
words = ["Py", "thon"]

result = "".join(words)

print(result)

Output
Python
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