Strip and Collapse Whitespace
Write a function that strips leading/trailing whitespace and collapses inner runs of whitespace to single spaces.
Snake case to camel case
Implement a function that converts snake_case strings to camelCase.
Camel case to snake case
Write a function that converts camelCase input to snake_case while handling acronyms and numbers correctly.
Remove punctuation
Write a function that removes all ASCII punctuation characters from a string.
Is pangram
Write a function that determines whether a given string is a pangram, ignoring case and non-letter characters.
Caesar Cipher Shift
Implement a function to apply a Caesar cipher shift to a string, preserving case and ignoring non-letters.
Longest word in a sentence
Write a function that returns the longest word from a sentence, with first-occurrence tie-breaking.
Replace vowels with stars
Write a function that replaces every vowel in a given string with an asterisk.
Is isogram
Implement a function that determines whether a string is an isogram (no repeated letters, case-insensitive).
Kebab Case a Phrase
Implement a function that converts a phrase into lowercase kebab-case, handling spaces, punctuation, and camelCase.
Find all indexes of a substring
Write a function that returns a list of all starting indexes where a substring appears in a string, including overlapping occurrences.
Remove Consecutive Duplicate Letters
Implement a function that removes consecutive duplicate letters from a string, keeping only one occurrence of each run.
Is rotation of another string
Write a function to determine if one string is a rotation of another string.
Count words in a sentence
Implement a function to count words in a sentence, ignoring extra whitespace and handling empty strings.
Center a string in a width
Write a function that centers a string within a specified width by adding spaces on both sides.
Caesar Cipher Shift
Write a function that shifts letters in a string by a given amount, preserving case and ignoring non-letters.
Count consonants
Write a function that counts the number of consonant letters in a string.
Longest Word Finder
Write a function that extracts alphabetic words from a string and returns the longest one, with ties broken by earliest position.
Abbreviate Name
Create a function that takes a full name and returns an abbreviated version with initials and the last name.
Extract digits from string
Write a function that extracts all digit characters from a given string, preserving their original order.
Replace Spaces with Dashes
Write a function that replaces every space in a string with a dash.
Capitalize First Letter
Write a function that capitalizes the first letter of each word in a string.
Snake case converter
Implement a function that converts a string to snake_case according to given rules.
Camel Case Converter
Write a function that converts a space-separated phrase into lower camelCase.
Showing 1–24 of 57 challenges · Strings & Text
Strings & Text — Python coding challenges
What you will find here
This page lists strings & text challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.
Challenges vs tutorials and quizzes
Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.