Practice

Your code is run against real test cases and marked the moment you submit. Start with the easy ones — they are genuinely easy, not “easy for somebody who already knows”.

You can solve anything here without an account. Signing up is what remembers which ones you have finished, keeps your streak and pays the coins.

1 Easy

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Every problem gives you starter code in five languages, shows a worked example, and tells you exactly which test your program failed on — not just that it failed.

If a problem looks unfamiliar, read the tutorial on that topic first. They are meant to be used together: read, then solve, then read the next one.

Browse tutorials Open the compiler

Add Two Numbers

Even or Odd

Largest of Three Numbers

Sum from 1 to N

Factorial of N

Reverse a Number

Count the Vowels

Reverse a String

Multiplication Table

Star Triangle Pattern

Palindrome Number

Prime Number Check

GCD of Two Numbers

Fibonacci Series

Array Maximum and Minimum

Count Occurrences

Second Largest Element

Remove Duplicates

Anagram Check

Binary Search

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