Help understand please

Question

What in solution is [0]?
skills = {'Python', 'HTML', 'SQL', 'C++', 'Java', 'Scala'}
job_skills = {'HTML', 'CSS', 'JS', 'C#', 'NodeJS'}
print(list(skills&job_skills)[0])

Answer 1

skills, job_skills are two sets. Apply bitwise and & operation between them. You get a set of values which are in both.
On result, making a list.
Now [0] apply will pick value at index 0

Answer 2

Now i understand. Thank you