Dear @rawanalrfaie,
Welcome to the community.
Please share your problem in detail.
why 0 of 100
i expect there is issue with my code file location
You’re getting 0 score because the grader can’t run your code, because of the undefined ‘dist’ name.
As Tom says, you go to make sure you dont change the parts of the code you are not supposed too, the naming of the function should be consistent to what the grader expects! I would advise to reset the assignment (and redo it) at the question mark on the right top side of the Lab!