Use code academy to learn the basics of javascript. It's free. Once you learn the basics, come back to codewars and test your knowledge.

im pretty new to coding ...im trying to solve but i couldnt solve can u help me how to solve problems and think abt the question and how to apply javascript

For anyone in the 8 - 7 kyu range, I recommend using for loops to practice your for loop knowledge. Do not rely on memoryzing methods that. Memorizing methods as a beginner will only imede you in the future when you need a for loop. If you need help with a solution and ar a JavaScript user but don't want the exact answer, I would be happy yo help.