How to commit changes?

To commit changes in Git, follow these steps:

Stage the changes: Use the git add command to stage the files you want to commit. For example, to stage a file named hello.txt, run:
```
git add hello.txt
```
Commit the changes: Use the git commit command along with the -m option to add a commit message that describes the changes. For example:
```
git commit -m "Your commit message here"
```
Verify the commit: You can check the status of your repository to ensure that the changes have been committed by running:
```
git status
```

After these steps, your changes will be saved in the repository's history.