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467 challenges 330 easy 120 medium 17 hard

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Strings & Text easy

Remove Consecutive Duplicate Letters

Implement a function that removes consecutive duplicate letters from a string, keeping only one occurrence of each run.

strings loops manipulation

Strings & Text easy

Interleave Two Strings

Given two strings s1 and s2, return a new string that interleaves them character by character, starting with s1.

strings merging loops

Strings & Text easy

Count consonants

Write a function that counts the number of consonant letters in a string.

strings counting loops

Strings & Text easy

Remove Duplicates from String

Given a string, return a new string with each character that repeats consecutively reduced to a single occurrence.

strings loop filter

Strings & Text easy

Count Syllables (Simple)

Count syllables in a word by counting groups of consecutive vowels (a, e, i, o, u).

strings vowels counting

Strings & Text easy

Expand compressed string

Implement a function that expands run-length encoded strings (e.g., 'a3b2' → 'aaabb').

strings parsing run-length-encoding

Showing 6 challenges · easy · 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.