Python运算符 //、/、%使用与区别详解

a / b

print(10 / 3)   # 输出: 3.3333333333333335
print(9 / 2)    # 输出: 4.5
print(10 / 2)   # 输出: 5.0 (注意结果是浮点数)

a // b

print(10 // 3)   # 输出: 3
print(9 // 2)    # 输出: 4
print(-10 // 3)  # 输出: -4 (注意负数的结果)
print(10.0 // 3) # 输出: 3.0 (操作数有浮点数则返回浮点数)

a % b

print(10 % 3)    # 输出: 1
print(9 % 2)     # 输出: 1
print(-10 % 3)   # 输出: 2 (注意负数的结果)
print(10.5 % 3)  # 输出: 1.5 (支持浮点数)

# 计算平均值
grades = [85, 90, 78, 92]
average = sum(grades) / len(grades)
print(average)  # 输出: 86.25

total_items = 103
items_per_page = 10
total_pages = (total_items + items_per_page - 1) // items_per_page
print(total_pages)  # 输出: 11

seconds = 3661
minutes = seconds // 60
remaining_seconds = seconds % 60
print(f"{minutes}分{remaining_seconds}秒")  # 输出: 61分1秒

number = 7
if number % 2 == 0:
    print("偶数")
else:
    print("奇数")  # 输出: 奇数

buffer_size = 5
index = 0
for i in range(10):
    index = (index + 1) % buffer_size
    print(index, end=" ")  # 输出: 1 2 3 4 0 1 2 3 4 0

print(-10 // 3)  # 输出: -4 (不是-3)
print(-10 % 3)   # 输出: 2 (不是-1)

print(0.1 + 0.2 == 0.3)  # 输出: False
print(0.1 % 0.1)         # 输出: 0.0
print(0.2 % 0.1)         # 输出: 0.0 (但实际可能因浮点精度有微小差异)

try:
    print(10 // 0)
except ZeroDivisionError as e:
    print(f"错误: {e}")  # 输出: 错误: integer division or modulo by zero