How to fix recurring bugs

Question

Trying to get my kotlin certificate but I'm failing to complete the four projects

Answer 1

Jacob Mashonganyika You might want to make each project a question and show your attempt. You could also ask something more specifically relating to one of the project attempts here. The question is currently to vague to answer.
But, generally to debug, carefully read the instructions. Then starting with the basics, check that you have addressed all of the requirements listed. Don't assume, thoughtfully check your code against each requirement.