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join() function in Python
  • Difficulty Level : Basic
  • Last Updated : 02 Jan, 2018


The join() method is a string method and returns a string in which the elements of sequence have been joined by str separator.

Syntax:

string_name.join(iterable) 

string_name: It is the name of string in which
             joined elements of iterable will be
             stored.

Parameters: The join() method takes iterable – objects capable of returning its 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.



Below program illustrates the working of join() method:




# Python program to demonstrate the
# use of join function to join list
# elements with a character.
  
list1 = ['1','2','3','4'
  
s = "-"
  
# joins elements of list1 by '-'
# and stores in sting s
s = s.join(list1)
  
# join use to join a list of
# strings to a separator s
print(s)

Output:

1-2-3-4

Joining with empty string.




# Python program to demonstrate the
# use of join function to join list
# elements without any separator.
  
# Joining with empty separator
list1 = ['g','e','e','k', 's'
print("".join(list1))

Output:

geeks

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