Learn Python Programming for Beginners: THE COMPLETE GUIDE TO LEARN CODING WITH PYTHON. BECOME FLUENT IN THIS HIGH-LEVEL PROGRAMMING LANGUAGE. by Scratch Jason

Author:Scratch, Jason [Scratch, Jason]
Language: eng
Format: epub
Published: 2020-07-22T16:00:00+00:00

You’ve already seen variables in mathematics. For example, you could say that there exist variables x and y such that

In this sense, x and y are the variable names, and 25 and 42 are their respective values. It’s just like slapping a sticker on an item. The sticker is used to identify the value of the item.

Likewise, in math, when you are given that

Then you would say that . This works the same with the data types that we have currently learned.

There are three key components to working with variables: creating a variable, modifying the variable, and getting the value of a variable. Let’s see how this is done.

Creating a Variable

In Python, to create a variable, you would enter in some name (that is not predefined by Python), and assign it to a value using an equal sign. Notice how we say that we assign a variable. The value assigned to it should either be a literal or an expression. A literal is a fixed value - in other words, a value that is written exactly as it is meant to be interpreted. A literal value is the actual value a variable corresponds to. So as an integer, for instance, literals could be 4, 9, 13, and -25. A string literal would resemble something similar to “What a nice day!”, where you have plain text enclosed either in double quotes (“) or single quotes (‘). A boolean, as stated earlier, would simply be True or False , and a float would be a number that contains a decimal point.

# String literal

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