Java:
```
System.out.println("Hello World!");
```
C:
```
printf("Hello World!\n");
```
C++:
```
std::cout << “Hello World!” << std::endl;
```
C#:
```
Console.WriteLine(“Hello World!”) ;
```
Python:
```
print “Hello World!”
```
Java:
```
System.out.println("Hello World!");
```
C:
```
printf("Hello World!\n");
```
C++:
```
std::cout << “Hello World!” << std::endl;
```
C#:
```
Console.WriteLine(“Hello World!”) ;
```
Python:
```
print “Hello World!”
```