Python 成绩等级判定

score=int(input("请输入学生成绩:"))
if 90<=score<=100:
    grade="A"
elif 75<=score<=90:
    grade="B"
elif 60<=score<=75:
    grade="C"
elif score<60:
    grade="D"
print("本次考试，等级为:",grade)

运行结果：