练习、文件

#用range求1-2+3-4+...+99-100=？
count = 0
for i in range(1,101):
    if i % 2 == 0:
        count = count -i
    else:
        count = count + i
print(count)


#list在循环的时候不能删，因为会改变索引
lis = ["yi","er","san","si"]
for i in lis:
    lis.remove(i)
print(lis)
#结果：['er', 'si']

#冒泡排序
lis = [5,2,13,10,44,22]
i = 0
for j in range(7):
    while i < len(lis)-1:
        if lis[i] > lis[i+1]:
            lis[i],lis[i+1] = lis[i+1],lis[i]  //解构
        i = i+1
print(lis)

标签：count,文件,练习,si,0for,range,lis,er
来源： https://www.cnblogs.com/xiaojingjingzhuanshu/p/11211399.html