Join words with a space
Input
join_with_separator(['hello', 'world'], ' ')
Output
hello world
Each item is a string; they are joined with a single space.
Full lesson preview
Create a function to join words with a separator
Write a function that joins a sequence of items into a single string using a provided separator.
Python practice6 minFunctions & ScopeBeginnerLast updated March 17, 2026
Problem statement
Create a function join_with_separator(words, sep) that takes an iterable of items (strings, numbers, etc.) and a separator string sep. The function should convert each item to its string representation and join them with the separator. If the iterable is empty, return an empty string. The function must accept lists, tuples, and other iterables.
Task
Implement join_with_separator(words, sep) that converts items to strings and joins them with sep. Handle empty sequences and different iterable types.
Examples
Input format
An iterable (list/tuple/other) of items as the first argument and a string separator as the second argument.
Output format
A single string containing the joined items.
Constraints
Do not assume all items are strings. Convert items to strings before joining. The separator is always a string.
Samples
Sample 1
Input
join_with_separator(['a', 'b', 'c'], ',')
Output
a,b,c
The list items are joined by a comma.