To delete a branch locally in Git, you can use the git branch command and use a flag -D to set the command in deletion mode and pass the local name of the branch.
For example, consider a branch called new-features.
So the command looks like this,
git branch -D new-features
As you can see from the above command we have used the flag -D with the command which will instruct Git to delete a branch.
The flag doesn't have to be before the branch name, you can use the flag -D even after the branch name itself like this,
git branch new-features -D
Both ways of writing the command have the same effect.