how to create a branch off of another branch code example

Example 1: create a new branch based on another branch

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

Example 2: create branch from another branch

$ git checkout -b myFeature dev

Example 3: can i create a branch inside of another branch in GIT

$ git push origin dev
$ git push origin myFeature