week2

#超市抹零
price = 9.99
total = int(price)  # 抹零操作
print(total)  # 输出结果为9


#计算学生成绩的分差和平均分
scores = [85, 90, 92, 78, 80]
avg_score = sum(scores) / len(scores)  # 计算平均分
print("平均分为：", avg_score)

diff = []
for i in range(len(scores)):
    diff.append(scores[i] - avg_score) # 计算分差
print("分差为：", diff)

#比较大小
a = 5
b = 7
if a < b:
    print("a小于b")
else:
    print("a大于等于b")

#手机店打折
price = 1000
discount_rate = 0.7 # 打七折
discount_price = price * discount_rate # 计算打折后的价格
print("打折后的价格为：", discount_price)

print("后四位:3045")