Hello-YENTECH CSIE

this is an practice

    Please use the test.ipynb to show a "*" X'mas tree on the screen shch like fellowing:
    *
    **
    ***
    ****
    *****

Name		Name	Last commit message	Last commit date
Latest commit History 15 Commits
.ipynb_checkpoints		.ipynb_checkpoints
README.md		README.md
test.ipynb		test.ipynb