If git branch is deleted, why can that checkout?

Question

If git branch is deleted, why can that checkout?

git branch -d branch_name

Answer 1

You are only deleting your local branch with one of the following commands:

git branch -d <branch_name>
git branch -D <branch_name>

In order to remove the branch from the remote (most likely named origin) you will have to use one of the following commands:

git push origin --delete <branch_name>
git push origin :<branch_name>