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Beginner coding challenges
Practise beginner with 95 coding challenges, from easy to hard. Every challenge runs in your browser with instant tests, an AI review of your code and community solutions to compare.
Easy · 89 Medium · 6
Skills you'll practise: CountingArithmeticDigit extractionFormulasListsString splitting2D listsConditionsDivisibilityLoopsModuloSingle pass
- Python · C++ · C#
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All challenges
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Easy
Initials From a Name
Build uppercase initials from a full name.
You'll learn
String splittingUppercase
No solutions yet
Easy
Count Positive Numbers
Count the values greater than zero in a list.
You'll learn
ListsCounting
No solutions yet
Easy
Replace Spaces With Dashes
Turn spaces into dashes to make a URL-style slug.
You'll learn
String buildingCharacter replacement
No solutions yet
Easy
Count Uppercase Letters
Count the capital letters in a text.
You'll learn
Character checksCounting
No solutions yet
Easy
Second Largest Value
Find the second largest distinct value.
You'll learn
Two trackersDistinct values
No solutions yet
Easy
Above-Average Values
Keep the values that are greater than the average.
You'll learn
Two passesFiltering
No solutions yet
Easy
Count Vowels
Count the vowels in a piece of text.
You'll learn
Character checksSet membership
No solutions yet
Easy
Odd, Even, or Neither
Classify a number by whether it is an odd integer, an even integer, or neither.
You'll learn
ModuloConditions
No solutions yet
Easy
Array Maximum
Find the largest value in a list.
You'll learn
Tracking a maximumSingle pass
No solutions yet
Easy
Array Minimum
Find the smallest value in a list.
You'll learn
Tracking a minimumSingle pass
No solutions yet
Easy
Fizz Buzz
Build a sequence using divisibility by 3 and 5.
You'll learn
ConditionsDivisibility
No solutions yet
Easy
Longest Word
Find the longest word in a sentence.
You'll learn
String splittingTracking a maximum
No solutions yet
Easy
Count Words
Count the words in a sentence.
You'll learn
String splittingWhitespace
No solutions yet
Easy
Classify a Number by Its Divisors
Classify a positive integer as perfect, abundant, or deficient.
You'll learn
DivisorsClassification
No solutions yet
Easy
Running Sum
Replace each value with the total so far.
You'll learn
Prefix sumsLists
No solutions yet
Easy
Array Average
Compute the average of a list of numbers.
You'll learn
Sum and countFloat division
No solutions yet
Easy
Move Zeroes
Move every zero to the end while keeping the other order.
You'll learn
Two pointersIn-place updates
No solutions yet
Easy
Rotate Array
Rotate a list to the right by some steps.
You'll learn
Array indexingModulo
No solutions yet
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