JavaScript Strings Coding Practice Problems Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Strings are one of the most essential data types in JavaScript, used for handling and manipulating text-based data. This curated list of JavaScript string practice problems covers everything master JavaScript Strings. Whether you're a beginner or an experienced developer, these problems will enhance your JavaScript string manipulation skills!Strings Practice ProblemsEasyLength of StringFirst OccurrenceReverse StringPangram CheckingCount Words in StringSlice The StringFind PatternPrint AlphabetsReverse digitsFirst Repeated CharacterReverse WordsRoman Number to IntegerRemove DuplicatesLongest Common PrefixUncommon charactersMinimum indexed characterLicense Key FormattingPanagram CheckingMediumAnagramFind one extra characterSubstringGetLine 1Palindrome StringPower SetPermutations of a StringNext PermutationString Rotated by 2 PlacesLongest substring with distinct charactersSearch Pattern (Z-algorithm)Find largest word in dictionaryValidate an IP AddressEqual 0, 1 and 2Add Binary StringsSum of two large numbersMultiply two stringsLook and Say PatternMinimum Repeating SubstringExcel Sheet | Part - 1Form a palindromeNext higher palindromic numberLongest Palindromic SubsequenceLength of the longest substringSubstrings of length k with k-1 distinct elementsSubstrings with K DistinctInterleaved StringsPrint Anagrams TogetherRank The PermutationsMinimum DeletionsHardImplement AtoiSearch Pattern (Rabin-Karp Algorithm)Longest Prefix SuffixSmallest window containing all charactersRestrictive Candy CrushShortest Common SupersequenceNumber of distinct words with K maximum contiguous vowelsLongest substring to form a PalindromeLongest valid ParenthesesDistinct palindromic substringsFind the N-th characterLongest Prefix SuffixLongest Substring with K Uniquesk-AnagramNumber of distinct subsequencesStrings QuizString Comment More info S souravsharma098 Follow Improve Article Tags : JavaScript Web Technologies JavaScript-DSA JavaScript-Questions JavaScript-Quiz +1 More Explore JavaScript BasicsIntroduction to JavaScript4 min readVariables and Datatypes in JavaScript6 min readJavaScript Operators5 min readControl Statements in JavaScript4 min readArray & StringJavaScript Arrays7 min readJavaScript Array Methods7 min readJavaScript Strings6 min readJavaScript String Methods9 min readFunction & ObjectFunctions in JavaScript5 min readJavaScript Function Expression3 min readFunction Overloading in JavaScript4 min readObjects in Javascript4 min readJavaScript Object Constructors4 min readOOPObject Oriented Programming in JavaScript3 min readClasses and Objects in JavaScript4 min readWhat Are Access Modifiers In JavaScript ?5 min readJavaScript Constructor Method7 min readAsynchronous JavaScriptAsynchronous JavaScript2 min readJavaScript Callbacks4 min readJavaScript Promise4 min readEvent Loop in JavaScript4 min readAsync and Await in JavaScript2 min readException HandlingJavascript Error and Exceptional Handling6 min readJavaScript Errors Throw and Try to Catch2 min readHow to create custom errors in JavaScript ?2 min readJavaScript TypeError - Invalid Array.prototype.sort argument1 min readDOMHTML DOM (Document Object Model)9 min readHow to select DOM Elements in JavaScript ?3 min readJavaScript Custom Events4 min readJavaScript addEventListener() with Examples9 min readAdvanced TopicsClosure in JavaScript4 min readJavaScript Hoisting6 min readJavascript Scope3 min readJavaScript Higher Order Functions7 min readDebugging in JavaScript4 min read Like