编程代码示例怎么写的

Python

打印“Hello, World!”：

```python

print("Hello, World!")

```

计算两个数的和：

```python

a = 5

b = 3

sum = a + b

print(sum)

```

判断一个数是否为偶数：

```python

num = 8

if num % 2 == 0:

print("Even")

else:

print("Odd")

```

Java

打印“Hello, World!”：

```java

public class HelloWorld {

public static void main(String[] args) {

System.out.println("Hello, World!");

}

}

```

计算两个数的和：

```java

public class Sum {

public static void main(String[] args) {

int a = 5;

int b = 3;

int sum = a + b;

System.out.println(sum);

}

}

```

判断一个数是否为偶数：

```java

public class EvenOdd {

public static void main(String[] args) {

int num = 8;

if (num % 2 == 0) {

System.out.println("Even");

} else {

System.out.println("Odd");

}

}

}

```

C++

打印“Hello, World!”：

```cpp

include

using namespace std;

int main() {

cout << "Hello, World!" << endl;

return 0;

}

```

计算两个数的和：

```cpp

include

using namespace std;

int main() {

int a = 5;

int b = 3;

int sum = a + b;

cout << sum << endl;

return 0;

}

```

判断一个数是否为偶数：

```cpp

include

using namespace std;

int main() {

int num = 8;

if (num % 2 == 0) {

cout << "Even" << endl;

} else {

cout << "Odd" << endl;

}

return 0;

}

```

JavaScript

打印“Hello, World!”：

```javascript

console.log("Hello, World!");

```

计算两个数的和：

```javascript

let a = 5;

let b = 3;

let sum = a + b;

console.log(sum);

```

判断一个数是否为偶数：

```javascript

let num = 8;

if (num % 2 === 0) {

console.log("Even");

} else {

console.log("Odd");

}

```

这些示例代码展示了如何在不同编程语言中执行基本的操作，如打印输出、变量赋值、条件判断和算术运算。你可以根据自己的需求选择合适的示例进行学习和参考。