First Steps
Comments in Python
Learn about comments in Python and how to use them to structure and describe our code.
Let's talk about comments in your code.
A very important aspect of programming is documenting what you are doing.
In Python, you can add comments to your code to make it more understandable.
You can add a comment using the # symbol.
# this is a comment
print(10)
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Everything after the # symbol is ignored when we run our code.
The following code will throw an error because num is not really created:
# num = 10
print(num)
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Output
What will be the output?
price = 1
# price = 10
print(price)
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You can even add comments at the end of an existing code line. This is called an inline comment:
print(num) # I am an inline comment
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Using comments, we can structure our code and make it very clear what our program is doing. Here's an example:
# 1. Declare variables:
price = 10 # the price of our product
quantity = 5 # the ordered quantity
# 2. Updating variable values:
quantity = 10 # the customer has doubled the order
# 3. Printing the values:
print(price)
print(quantity)
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