Should I use a functional resume to hide a gap?

Usually not. Many recruiters distrust resumes without a timeline. A normal chronological resume with the gap labeled honestly tends to read better.

Do I have to say why I had a gap?

You do not have to share details. A short, general reason such as caregiving, relocation or health is enough for most employers.

How long a gap is too long?

There is no fixed limit. The longer the gap, the more it helps to show recent learning or work that proves your skills are current.

How to explain a career gap on your resume

How to explain a career gap from caregiving, relocation, health or a layoff on your resume, in a cover letter and in interviews, honestly and briefly.