python中关于range()函数反向遍历的几种表达_python

for i in range(10,0,-2):#有10
    print(i)
print('1111111111111111111111111111')
for i in range(0,10,2):#没10
    print(i)
print('2222222222222222222222222222')
for i in range(10,0,2):#不输出不报错
    print(i)
print('1111111111111111111111111111')
for i in range(0,10,-2):#不输出不报错
    print(i)
结果:
10
8
6
4
2
1111111111111111111111111111
0
2
4
6
8
2222222222222222222222222222
1111111111111111111111111111
>>> 

a=range(4) # [0, 1, 2, 3]
new =[]
for i in reversed(a):
new.append(i)
print(  new) # [3, 2, 1, 0]

//第三个参数表示的是100所有进行的操作，每次加上-1，直到0
for i in range(100,0,-1):
print(i)