<p>If you presented me with the epsilon delta def. of a limit, I would’ve probably said “ew” as a junior in high school seeing as I wanted to major in journalism. Fast forward a bit and since I’m graduating in the spring as a math major, I’d say you absolutely do not need to understand it when you’re in high school. You absolutely do in every sense if you are going to graduate as a math major, however.</p>
<p>I only completed Algebra II in high school. Trust me, you’re fine if you want to be a math major. </p>