points?=?-5
if?points?????points?=?0
print（points）


points?=?10
seconds?=?20
if?points?>?seconds:
????print（“Lead?is?safe.“）
else:
????print（‘Lead?is?not?safe.‘）


score?=?float（input（‘input?your?score:‘））
if?score?>=?90:
????print（‘A‘）
elif?score>=?80:
????print（‘B‘）
elif?score>=?70:
????print（‘C‘）
elif?score>=?60:
????print（‘D‘）
else:
????print（‘E‘）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-07-30?15:30??controlstatement\
?????目錄???????????0??2019-07-30?16:34??controlstatement\.idea\
?????文件?????????454??2019-04-26?10:51??controlstatement\.idea\controlstatement.iml
?????文件?????????201??2019-04-26?10:51??controlstatement\.idea\misc.xml
?????文件?????????291??2019-04-26?10:51??controlstatement\.idea\modules.xml
?????文件???????15912??2019-07-30?16:34??controlstatement\.idea\workspace.xml
?????目錄???????????0??2019-07-29?11:51??controlstatement\__pycache__\
?????文件?????????477??2019-07-29?11:51??controlstatement\__pycache__\p01_if.cpython-37.pyc
?????目錄???????????0??2019-07-29?11:51??controlstatement\build\
?????目錄???????????0??2019-07-29?11:51??controlstatement\build\p01_if\
?????文件???????23692??2019-07-29?11:51??controlstatement\build\p01_if\Analysis-00.toc
?????文件????????8753??2019-07-29?12:00??controlstatement\build\p01_if\EXE-00.toc
?????文件?????6587677??2019-07-29?12:00??controlstatement\build\p01_if\PKG-00.pkg
?????文件????????7723??2019-07-29?12:00??controlstatement\build\p01_if\PKG-00.toc
?????文件?????1413806??2019-07-29?11:51??controlstatement\build\p01_if\PYZ-00.pyz
?????文件???????16907??2019-07-29?11:51??controlstatement\build\p01_if\PYZ-00.toc
?????文件??????780741??2019-07-29?11:51??controlstatement\build\p01_if\base_library.zip
?????文件????????1031??2019-07-29?12:00??controlstatement\build\p01_if\p01_if.exe.manifest
?????文件????????4384??2019-07-29?11:51??controlstatement\build\p01_if\warn-p01_if.txt
?????文件??????339040??2019-07-29?11:51??controlstatement\build\p01_if\xref-p01_if.html
?????目錄???????????0??2019-07-29?12:00??controlstatement\dist\
?????文件?????6861085??2019-07-29?12:00??controlstatement\dist\p01_if.exe
?????文件?????????383??2019-04-26?10:59??controlstatement\p01_if.py
?????文件?????????908??2019-07-29?12:00??controlstatement\p01_if.spec
?????文件?????????107??2019-04-26?11:05??controlstatement\p02_while.py
?????文件?????????170??2019-04-26?11:09??controlstatement\p03_for.py
?????文件?????????518??2019-04-26?11:21??controlstatement\p04_elsebreak.py
?????文件?????????449??2019-04-26?15:20??controlstatement\p05_continue.py
?????文件?????????228??2019-04-26?15:31??controlstatement\p06_range.py
?????文件?????????250??2019-07-30?15:30??controlstatement\p07_sin.py
?????目錄???????????0??2019-04-26?10:50??controlstatement\venv\
............此處省略5個文件信息