What is the purpose of 'git add' in Git?

The git add command in Git is used to stage changes in your working directory for the next commit. It prepares the specified files or changes to be included in the commit history. Here are the key purposes of git add:

1. Staging Changes: It allows you to select which changes you want to include in your next commit. This is useful for managing what gets committed, especially when you've made changes to multiple files but only want to commit some of them.

2. Granular Control: By staging changes, you can create commits that are focused and meaningful. This helps in maintaining a clean project history, making it easier to understand the evolution of the project.

3. Tracking New Files: When you create new files, git add tells Git to start tracking those files. Until you run git add, new files remain untracked and will not be included in commits.

4. Preparing for Commit: After staging changes with git add, you can then create a commit using git commit, which captures the staged changes in the repository's history.

Example Usage:

To stage a specific file:

git add filename.txt

To stage all changes in the current directory:

git add .

To stage specific types of files (e.g., all .txt files):

git add *.txt

In summary, git add is a crucial command in the Git workflow that allows you to control which changes are included in your commits, facilitating better version control and project management.