Book Image

Learning C for Arduino

By : Syed Omar Faruk Towaha
Book Image

Learning C for Arduino

By: Syed Omar Faruk Towaha

Overview of this book

This book will start with the fundamentals of C programming and programming topics, such data types, functions, decision making, program loops, pointers, and structures, with the help of an Arduino board. Then you will get acquainted with Arduino interactions with sensors, LEDs, and autonomous systems and setting up the Arduino environment. Moving on you will also learn how to work on the digital and analog I/O, establish serial communications with autonomous systems, and integrate with electronic devices. By the end of the book, you will be able to make basic projects such as LED cube and smart weather system that leverages C.
Table of Contents (17 chapters)
Learning C for Arduino
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Variables


Variables are used to store data in programming languages. You might remember from your algebra class that, The number of chocolates is x, where we didn't know the value of x, but after the math was done, we found the value of x. Let's make it clear by giving an example. Consider a scenario: A boy has 23 pencils; he buys 13 pencils. How many pencils does he have now?

It's simple. Just sum up all the numbers. But let's try to do it using a variable. We can solve it as follows:

The number of pencils the boy has now is x:

So, x = 23+13 Or, x = 46

We have found the value of x, which is the total number of pencils the boy has now.

Have you noticed we stored the number of pencils on the variable x? Yes, this is what we do with variables.

In C programming, we often need to declare variables inside our code. During the C program execution, an entity that may vary is called a variable. There are a few rules for declaring a variable name. We cannot name our variables however we want, but aside...