Free for every student, forever

Learn to code
without fear.
With guidance.

Kodlume teaches Python and Java the right way — through your own thinking, with an AI tutor that guides you instead of solving things for you.

Start Learning Free →See how it works
15+Problems
2Languages
7Step Framework
0Cost
two_sum.py
⭐ Problem #1 · Beginner

Two Sum

AI

Good start! You stored nums[0] in your map. Now — what happens when you look at nums[1] = 7? What are you searching for? 🤔

def two_sum(nums, target):
  seen = {}
  for i, num in enumerate(nums):
    complement = # ??? what goes here
Step 4/7
+70 XP earned
🧭

Guided, Not Told

7-step thinking framework for every problem. You reach the solution yourself — we just light the path.

🤖

AI That Teaches

Our AI tutor never gives you the answer. It asks the right questions at the right moment, just like a great teacher.

🌱

Built for Beginners

No intimidation. No pressure. Just you, growing at your own pace, celebrated every step of the way.