字符串

字符串反转

1、while循环

str01 = "hello"

i=len(str01)-1

s=''
while i>=0:
    s+=str01[i]
    i-=1
print(s)

2、字符串切片

str01 = "hello"

print(str01[::-1])

3、列表函数

str01 = "hello"

str02=list(str01)

str02.reverse()
print(''.join(str02))