4-3 数到20
for n in range(1,21): print(n)
4-5 计算1-1000000的总和
number=list(range(1,1000001)) print(min(number)) print(max(number)) print(sum(number))
4-7 3的倍数
numbers=list(range(3,31,3)) for i in numbers: print(i)
4-9 立方解析
cube=[value**3 for value in range(1,11)] print (cube)
4-10 切片
cube=[value**3 for value in range(1,11)] print (cube) print ("Firsr three items in this list :") print (cube[0:3]) print ("Middle three items in this list :") print (cube[3:6]) print ("last three items in this list :") print (cube[-3:])