1
num = int(input("请输入一个整数: "))
2
if num % 2 == 0:
3
    print(f"{num} 是偶数")
4
else:
5
    print(f"{num} 是奇数")

1
ls = [1, 2, 1, 2, 3, 5, 4, 3, 7, 4, 7, 8, 9]
2

3
# 保持原有顺序的去重
4
new_ls = []
5
for i in ls:
6
    if i not in new_ls:
7
        new_ls.append(i)
8
print("去重后的列表:", new_ls)

1
def is_substring(str1, str2):
2
    return str2 in str1
3

4
# 测试
5
print(is_substring("hello world", "world"))  # 输出: True

1
i = 10
2
while i >= 1:
3
    print(i, end=" ")
4
    i -= 1
5
print()  # 换行

1
import math
2

3
total = 68.5
4
car1_capacity = 4
5
car1_times = 3
6
car2_capacity = 2.5
7

8
# 计算剩余的煤量
9
remaining = total - (car1_capacity * car1_times)
10
# 计算剩余需要的次数，若有余数则需要向上取整
11
times = math.ceil(remaining / car2_capacity)
12
print(f"还需要运送 {times} 次才能运送完。")

1
import math
2

3
num1 = int(input("请输入第一个整数: "))
4
num2 = int(input("请输入第二个整数: "))
5
print("最大公约数是:", math.gcd(num1, num2))

1
def is_triangle(a, b, c):
2
    # 三角形判定条件：任意两边之和大于第三边
3
    return a + b > c and a + c > b and b + c > a
4

5
# 测试
6
a = float(input("边长a: "))
7
b = float(input("边长b: "))
8
c = float(input("边长c: "))
9
print("是否能构成三角形:", is_triangle(a, b, c))

1
odd_sum = 0
2
for i in range(1, 101):
3
    if i % 2 != 0:
4
        odd_sum += i
5
print("1-100之间的奇数和为:", odd_sum)

1
student = {"name": "小明", "age": 18, "score": 92}
2

3
# 添加“gender”键值对
4
student["gender"] = "男"
5
# 修改“score”的值
6
student["score"] = 95
7

8
print(student)

1
fruits = ["apple", "banana", "orange"]
2

3
# 列表推导式
4
new_list = [len(item) for item in fruits]
5

6
print(new_list)  # 输出: [5, 6, 6]

1
import math
2

3
r = float(input("请输入圆的半径: "))
4
diameter = 2 * r
5
area = math.pi * (r**2)
6

7
print(f"圆的直径为: {diameter:.2f}")
8
print(f"圆的面积为: {area:.2f}")

1
def reverse_string(s):
2
    # 使用切片操作 [::-1] 快速反转
3
    return s[::-1]
4

5
user_str = input("请输入一个字符串: ")
6
print("反转后的字符串:", reverse_string(user_str))

1
tup = (1, 23, 56, "hi", [1, 2])
2
# 访问元组的最后一个元素并使用 append 方法
3
tup[-1].append("h")
4
print(tup)  # 输出: (1, 23, 56, 'hi', [1, 2, 'h'])

1
for i in range(1, 51):
2
    if i % 3 == 0:
3
        print(i, end=" ")
4
print()

1
year = int(input("请输入年份: "))
2
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
3
    print(f"{year} 是闰年")
4
else:
5
    print(f"{year} 不是闰年")

1
def print_primes(n):
2
    for num in range(2, n + 1):
3
        is_prime = True
4
        for i in range(2, int(num**0.5) + 1):
5
            if num % i == 0:
6
                is_prime = False
7
                break
8
        if is_prime:
9
            print(num, end=" ")
10
    print()
11

12
n = int(input("请输入一个正整数n: "))
13
print(f"1到{n}之间的质数有:")
14
print_primes(n)

1
num = float(input("请输入一个数: "))
2
if num > 0:
3
    print("这是一个正数")
4
elif num < 0:
5
    print("这是一个负数")
6
else:
7
    print("这是0")

1
nums = [23, 15, 7, 48, 32, 91]
2
average = sum(nums) / len(nums)
3
print(f"平均值为: {average:.2f}")

1
def calculate_product():
2
    result = 1
3
    for i in range(3, 21):
4
        result *= i
5
    return result
6

7
print("计算结果为:", calculate_product())

1
total_sum = 0
2
i = 1
3
while i <= 100:
4
    total_sum += i
5
    i += 1
6
print("1-100之间所有数的和为:", total_sum)