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COMPUTER SOFTWARE APPLICATION - CITS

2 Script Mode Programming
We can write a simple Python program in a script which is simple text file. Python files have extension .py. Type
the following source code in a test.py file...

print (“Hello, World!”)
We assume that you have Python interpreter path set in PATH variable. Now, let’s try to run this program as
follows...

test.py
Result-
Hello, World!

Python Comments
Comments can be used to explain Python code.

Comments can be used to make the code more readable.
Comments can be used to prevent execution when testing code.
Creating a Comment
Comments starts with a #, and Python will ignore them.
Example:

#This is a comment
print(“Hello, World!”)
Single line Comment
Comments can be placed at the end of a line, and Python will ignore the rest of the line.
Example:

print(“Hello, World!”) #This is a comment
A comment does not have to be text that explains the code, it can also be used to prevent Python from executing
code.

Example:
#print(“Hello, World!”)
print(“Cheers, Mate!”)
Multiline Comments
Python does not really have a syntax for multiline comments.

To add a multiline comment you could insert a # for each line.
Example:
#This is a comment
#written in

#more than just one line
print(“Hello, World!”)
Or, not quite as intended, you can use a multiline string.
Since Python will ignore string literals that are not assigned to a variable, you can add a multiline string (triple
quotes) in your code, and place your comment inside it.
Example:
“””

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CITS : IT&ITES - Computer Software Application - Lesson 120 - 137