1. 編寫?個函數(shù)床牧，求1+2+3+...+N

答案：

def sum_n(n):
    sum1 = 0
    for i in range(n+1):
        sum1 += i
    print(sum1)
sum_n(3)

2. 編寫?個函數(shù)彭谁，求多個數(shù)中的最?值

答案：

import random
def n_num_max(n):
    num1 = []
    for i in range(n):
        num = random.randint(200,500)
        num1.append(num)
        max_num = max(num1)
    print(num1)
    print(max_num)
n_num_max(10)

3. 編寫?個函數(shù)肛捍，實(shí)現(xiàn)搖??的功能椭微，打印n個??的點(diǎn)數(shù)和

答案：

import random
def roll_the_dice(n):
    sum1 = 0
    for i in range(n):
        num = random.randint(1,6)
        sum1 += num
        print(num)
    print(sum1)
roll_the_dice(2)

4. 編寫?個函數(shù)洞坑，交換指定字典的key和value。

答案：

例如:{'a':1, 'b':2, 'c':3} ---> {1:'a', 2:'b', 3:'c'}

def exchage_key_and_value():
    dict1 = {'a': 1, 'b': 2, 'c': 3}
    aa = list(dict1.keys())
    bb = list(dict1.values())
    print(aa)
    print(bb)
    aaaa = []
    for index in range(len(bb)):
        aaa = []
        aaa.append(bb[index])
        aaa.append(aa[index])
        aaaa.append(aaa)
    aaaa = dict(aaaa)
    print(aaaa)

5. 編寫?個函數(shù)蝇率，三個數(shù)中的最?值

答案：

def max_num1_num2_num2(num1,num2,num3):
    max_num = max(num1,num2,num3)
    print(max_num)
max_num1_num2_num2(1,2,3)

6. 編寫?個函數(shù)检诗，提取指定字符串中的所有的字?，然后拼接在?起

后打印出來
例如：'12a&bc12d--' ---> 打印'abcd'

答案：

def find_zimu():
    import string
    import random
    a =""
    for i in range(6):
        str1 = string.ascii_letters
        str11 = random.choice(str1)
        a += str11
        num = random.randint(20, 50)
        a += str(num)
    new_str = a
    print(a)
    new_new_str = ' '
    for item in new_str:
        if item.isalpha():
            new_new_str += item
    print(new_new_str)
find_zimu()

7. 寫?個函數(shù)瓢剿，求多個數(shù)的平均值

答案：

n = int(input("你想求幾個數(shù)的平均值："))
import random
def many_num_sum(n):
    a = []
    for i in range(n):
        b = random.randint(1,1000)
        a.append(b)
    print(a)
    print(sum(a)/len(a))
many_num_sum(n)

8. 寫?個函數(shù)，默認(rèn)求10的階層悠轩，也可以求其他數(shù)的階層

答案：

def random_num_jiecheng(num):
    print(num)
    cj = 1
    for i in range(1,num+1):
        cj *= i
    print(cj)
import random
random_num_jiecheng(num = random.randint(1,10))

9. 寫?個函數(shù)间狂，可以對多個數(shù)進(jìn)?不同的運(yùn)算

例如:
operation('+', 1, 2, 3) ---> 求 1+2+3的結(jié)果
operation('-', 10, 9) ---> 求 10-9的結(jié)果
operation('', 2, 4, 8, 10) ---> 求 24810的結(jié)構(gòu)

答案：

def differernt_function():
    sum = 0
    for i in range(0,11):
        sum += i
    print("和為",sum)
    num1 = int(input("輸入被減數(shù)："))
    num2 = int(input("請輸入減數(shù)："))
    cha = num1 - num2
    print("差",cha)
    cj = 1
    for j in range(0,11,2):
        cj *= j
    print("偶數(shù)乘積",cj)
differernt_function()