Print the first parameter

Created on Dec. 9, 2016 by Julien Palard

Write a script that print the first parameter given to the script.

If there is no parameters given, it should print the following error message on stdout:

usage: python3 solution.py PARAM

Advice

Maybe you'll need to import a few modules in your program.

Example

julien@localhost$ python3 solution.py antoine
antoine
julien@localhost$ python3 solution.py julien
julien
julien@localhost$ python3 solution.py
usage: python3 solution.py PARAM
julien@localhost$

references

if: https://docs.python.org/3/reference/compound_stmts.html#if

sys.argv: https://docs.python.org/3/library/sys.html#sys.argv

len: https://docs.python.org/3/library/functions.html#len