What are variables?

In Python, variables simply let you label and store/reference data. For example:

strings

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name = 'sir richard'

Strings represent text characters either quoted with '' or ""

standard variables

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# in cm
height = 65

Syntax rules for variable names

• Variable names cant start with numbers, only underscores or letters.

• You cant use special characters in name.

• They are case sensitive and are treated unique if cases differ.

breaking these rules will spitout a SyntaxError and display it in the logs.

Industry practices

• variables should be lower case

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user_name = 'graham_space'

• Descriptive names are the got to, you want people to be able to read your code and understand it. For example, a varible for ticker price should clearly say ticker_price not tp, price or ticker.

Comments

Code documentation is essential not only for others but for yourself to understand what your code does. in python, # comments all things after in a line.

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# this is a comment

this is not a comment

Next section: Print Functions and how they work