将以下两个字符串进行拼接：“Hello, ” 和 “world!”


string1 = "Hello, "
string2 = "world!"
# TODO: concatenate string1 and string2
可以使用"+"运算符来连接这两个字符串：

```
string1 = "Hello, "
string2 = "world!"
result = string1 + string2
print(result)  # 输出：Hello, world!
```