To delete a branch that we no longer need, we use git branch -d branch-name for a safe delete, which checks if the changes are merged. Make sure we are not on the branch we want to delete. For example, to delete the branch old-feature-branch:
If the branch has unmerged changes, Git will prevent the deletion and show an error like this:
If we're sure we want to delete the branch without checking if the changes are merged, we can force delete with git branch -D branch-name. Note the capital D in the command. For example, to delete the branch old-feature-branch without checking if the changes are merged: