Python如何实现字符串的反转

可以使用以下方法来实现字符串的反转：

1. 使用切片操作符[::-1]

def reverse_string(s):
    return s[::-1]

s = "hello"
reversed_s = reverse_string(s)
print(reversed_s)

2. 使用循环逆序遍历字符串

def reverse_string(s):
    reversed_s = ""
    for char in s:
        reversed_s = char + reversed_s
    return reversed_s

s = "hello"
reversed_s = reverse_string(s)
print(reversed_s)

3. 使用递归

def reverse_string(s):
    if len(s) == 0:
        return s
    else:
        return reverse_string(s[1:]) + s[0]

s = "hello"
reversed_s = reverse_string(s)
print(reversed_s)