Python String join() Method

Python join() is an inbuilt string function in Python used to join elements of the sequence separated by a string separator. This function joins elements of a sequence and makes it a string.

Example:

Output:

h-e-l-l-o

Python String join() Syntax

Syntax: string_name.join(iterable) 

Parameters: 

• Iterable – objects capable of returning their members one at a time. Some examples are List, Tuple, String, Dictionary, and Set

Return Value: The join() method returns a string concatenated with the elements of iterable. 

Type Error: If the iterable contains any non-string values, it raises a TypeError exception. 

String join() in Python Examples

Joining with an Empty String

Here, we join the list of elements using the join method.

Output: 

geeks
$g$e$e$k$s$

Joining String with Lists using Python join()

Here, we join the tuples of elements using the join() method in which we can put any character to join with a string.

Output: 

1-2-3-4

Joining String with Sets using join()

In this example, we are using a Python set to join the string.

Note: Set contains only unique value therefore out of two 4 one 4 is printed.

Output: 

1-#-3-#-2-#-4

Joining String with a Dictionary using join()

When joining a string with a dictionary, it will join with the keys of a Python dictionary, not with values.

Output:

'Geek_For_Geeks'

Joining a list of Strings with a Custom Separator using Join()

In this example, we have given a separator which is separating the words in the list and we are printing the final result.

Output :

apple@ banana@ cherry