Question

What is the difference between Si with an accent and Si without an accent?
si vs. sí

Answer 1

Sí (Yes) it can be an affirmation, a personal pronoun, or a noun equivalent to 'consent' or 'permission'. While si (if),on the other hand, it is a conjunction used to denote condition or assumption, as well as to name a musical note

Answer 2

(Sí is yes) and (si is a musical note)