如何使用 Python 的 if-elif-else 根据成绩确定等级

# Introduction

This tutorial will guide you through the process of implementing a grading system using Python's if-elif-else statements. You will learn how to determine a student's grade based on their marks, a common task in educational settings. By the end of this tutorial, you will have created a functional grading program that can be applied to real-world scenarios. This hands-on approach will strengthen your understanding of conditional statements in Python, which are fundamental building blocks for more complex programming logic.