expression
whether or not; presence or absence
Used to express that something is true regardless of whether a condition holds or something exists. Often follows a noun or clause.
理由があろうとなかろうと、遅刻は遅刻だ。
Whether there is a reason or not, being late is being late.
経験があろうとなかろうと、やる気があれば大丈夫です。
Whether you have experience or not, if you're motivated it's fine.