1、实现1-100的所有的和
'''
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'''
# 方法1:
sum = 0
for i in range(1,101):
sum += i
print(sum)
# 方法2:
num1 = int(input('请输入起始数字'))
num2 = int(input('请输入末尾数字'))
sum = (num1 + num2) * num2 / 2
print(int(sum))
2、实现1-500所有奇数的和
'''
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'''
sum = 0
for i in range(1,501):
_,result = divmod(i,2)
if not result:
sum += i
print(sum)
3、实现1!+2!+3!+4!..+20!的结果
sum = 0
result = 0
for i in range(1,21):
if i == 1:
sum = i
else:
for j in range(1,i+1):
if j == 1:
result = 1
else:
result *= j
sum += result
print(sum)
4、对指定的list进行排序[2,32,43,453,54,6,576,5,7,6,8,78,7,89]
# sorted()拷贝排序
li = [2,32,43,453,54,6,576,5,7,6,8,78,7,89]
new_li= sorted(li)
print(li) # 原列表不变
print(new_li)
# sort()是原地排序
li = [2,32,43,453,54,6,576,5,7,6,8,78,7,89]
li.sort()
print(li) # 直接对原列表进行修改