how to checkout existing branch in git bash code example

Example 1: createa. branch off of development git

//when on branch 'dev' make branch 'myFeature' off of 'dev'
git checkout -b myFeature dev

Example 2: git checkout branch

truelover@PEACE project % git checkout master
truelover@PEACE project % git checkout branch_name
#create branch
truelover@PEACE project % git checkout -b new_branch_name