Book Image

Learning Julia

By : Anshul Joshi, Rahul Lakhanpal
Book Image

Learning Julia

By: Anshul Joshi, Rahul Lakhanpal

Overview of this book

Julia is a highly appropriate language for scientific computing, but it comes with all the required capabilities of a general-purpose language. It allows us to achieve C/Fortran-like performance while maintaining the concise syntax of a scripting language such as Python. It is perfect for building high-performance and concurrent applications. From the basics of its syntax to learning built-in object types, this book covers it all. This book shows you how to write effective functions, reduce code redundancies, and improve code reuse. It will be helpful for new programmers who are starting out with Julia to explore its wide and ever-growing package ecosystem and also for experienced developers/statisticians/data scientists who want to add Julia to their skill-set. The book presents the fundamentals of programming in Julia and in-depth informative examples, using a step-by-step approach. You will be taken through concepts and examples such as doing simple mathematical operations, creating loops, metaprogramming, functions, collections, multiple dispatch, and so on. By the end of the book, you will be able to apply your skills in Julia to create and explore applications of any domain.
Table of Contents (17 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
8
Data Visualization and Graphics

Logical and arithmetic operations in Julia


Logical and arithmetic operations are very similar to in other programming languages. Julia has an exhaustive collection of all the operators required.

Let's start with the most common operators--arithmetic operators.

Performing arithmetic operations

Performing arithmetic operations, as discussed in the examples in previous sections, is straightforward. Julia provides a complete set of operators to work on.

Binary operators: +, -, *, /, ^, and %. These are just the most used and small subset of the binary operators that are available.

julia> a = 10;  b = 20; a + b
30

Unary operators: +, and -.

These are the unary plus and unary minus. The former performs the identity operation and the latter maps the values to their additive inverses.

julia> -4
-4

julia> -(-4)
4

There is a special operator ! that can be used with bool types. It is used to perform negation:

julia> !(4>2)
false

Performing bitwise operations

These are not frequently used, except...