Python Programming: Lesson 1 - Printing Statements and Comments

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In the previous lesson (https://youtu.be/Y2DahH65XW0), we downloaded the PyCharm IDE and briefly listed the topics that I will be investigating in this set of YouTube videos. Here, we learn how to write our first computer program in Python!

Use print( "Hello World!" ) to print Hello World! to the console. You can print a string (word, sentence, letter, number, etc.) if you use single or double quotes around the entire thing you want to print. A new line will be printed after the string. This makes it work like System.out.println( "Hello World!" ) in Java.

Comments in Python are denoted with # then a space after the hashtag. The space is a Python enhancement proposal (PEP), a suggestion or piece of etiquette that can be either accepted or ignored. Violations of PEP do NOT stop the code from running - they are just suggestions.

We also talk about arithmetic expressions in Python. It can perform arithmetic with +, subtraction with -, mutiplication with *, division with / (actual division rather than floor/integer division like in Java), exponentiation with **, floor (integer) division with //, and remainder with %. This will be discussed at greater length in the next video https://youtu.be/vyfi1Fmen4g

2:33 NEW: Configuring PyCharm
7:27 NEW: Printing Statements
11:43 NEW: Comments in Python
14:57 PEEK: Arithmetic Expressions

The corresponding lesson in Java is here: https://youtu.be/KUBoP8mnXkM
The corresponding lesson in C# is here: https://youtu.be/64ThGxYGr04

Ready for the next step? Check out arithmetic expressions in Python, lesson 2: https://youtu.be/vyfi1Fmen4g

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