如何计算字符串变量的长度

在大多数编程语言中，计算字符串变量的长度通常是通过调用该语言提供的一个内置函数或方法来完成的。以下是一些常见编程语言中计算字符串长度的方法：

Python

```python

string_variable = "Hello, World!"

length = len(string_variable)

```

JavaScript

```javascript

let stringVariable = "Hello, World!";

let length = stringVariable.length;

```

Java

```java

String stringVariable = "Hello, World!";

int length = stringVariable.length();

```

C

```csharp

string stringVariable = "Hello, World!";

int length = stringVariable.Length;

```

C++

```cpp

include

include

int main() {

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

int length = stringVariable.length();

std::cout << "Length of string: " << length << std::endl;

return 0;