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Julia Programming Projects

You're reading from   Julia Programming Projects Learn Julia 1.x by building apps for data analysis, visualization, machine learning, and the web

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Product type Paperback
Published in Dec 2018
Publisher Packt
ISBN-13 9781788292740
Length 500 pages
Edition 1st Edition
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Author (1):
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Adrian Salceanu Adrian Salceanu
Author Profile Icon Adrian Salceanu
Adrian Salceanu
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Table of Contents (13) Chapters Close

Preface 1. Getting Started with Julia Programming FREE CHAPTER 2. Creating Our First Julia App 3. Setting Up the Wiki Game 4. Building the Wiki Game Web Crawler 5. Adding a Web UI for the Wiki Game 6. Implementing Recommender Systems with Julia 7. Machine Learning for Recommender Systems 8. Leveraging Unsupervised Learning Techniques 9. Working with Dates, Times, and Time Series 10. Time Series Forecasting 11. Creating Julia Packages 12. Other Books You May Enjoy

Defining variables


We have seen in the previous chapter how to use the REPL in order to execute computations and have the result displayed back to us. Julia even lends a helping hand by setting up the ans variable, which automatically holds the last computed value.

 

But, if we want to write anything but the most trivial programs, we need to learn how to define variables ourselves. In Julia, a variable is simply a name associated to a value. There are very few restrictions for naming variables, and the names themselves have no semantic meaning (the language will not treat variables differently based on their names, unlike say Ruby, where a name that is all caps is treated as a constant).

Let's see some examples:

julia> book = "Julia v1.0 By Example" 
julia> pi = 3.14 
julia> ANSWER = 42 
julia> my_first_name = "Adrian"

Note

You can follow along through the examples in the chapter by loading the accompanying Jupyter/IJulia notebook provided with this chapter's support files.

The variables...

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