Merge the two given code snippets by replacing the word \_MERGE\_.
Code snippet 1:
def hello_world():
    print('Hello, World!')

Code snippet 2:
if __name__ == '__main__':
    _MERGE_
```python
def hello_world():
    print('Hello, World!')

if __name__ == '__main__':
    hello_world()
```
Complete the following task based on the instruction and optional input provided.### Instruction:
Merge the two given code snippets by replacing the word \_MERGE\_.

### Input:
Code snippet 1:
def hello_world():
    print('Hello, World!')

Code snippet 2:
if __name__ == '__main__':
    _MERGE_

### Output:
```python
def hello_world():
    print('Hello, World!')

if __name__ == '__main__':
    hello_world()
```