如何输出字符串长度

要输出字符串的长度，你可以使用多种编程语言中的内置函数或方法。以下是一些常见编程语言中输出字符串长度的示例：

Python

```python

string = "Hello, World!"

print(len(string))

```

JavaScript

```javascript

let string = "Hello, World!";

console.log(string.length);

```

Java

```java

String string = "Hello, World!";

System.out.println(string.length());

```

C

```csharp

string string = "Hello, World!";

Console.WriteLine(string.Length);

```

C++

```cpp

include

include

int main() {

std::string string = "Hello, World!";

std::cout << string.length() << std::endl;

return 0;