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Mastering Arduino

You're reading from   Mastering Arduino A project-based approach to electronics, circuits, and programming

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Product type Paperback
Published in Sep 2018
Publisher Packt
ISBN-13 9781788830584
Length 372 pages
Edition 1st Edition
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Author (1):
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Jon Hoffman Jon Hoffman
Author Profile Icon Jon Hoffman
Jon Hoffman
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Toc

Table of Contents (23) Chapters Close

Preface The Arduino FREE CHAPTER Basic Electronics Circuit Diagrams Basic Prototyping Arduino IDE Programming the Arduino - The Basics Programming the Arduino - Beyond the Basics Motion Sensor Environment Sensors Obstacle Avoidance and Collision Detection Fun with Lights Fun with Sound Using LCD Displays Speech Recognition and Voice Synthesizing DC Motors and Motor Controllers Servo Motors Using a Relay Remotely Controlling the Arduino Creating a Robot Bluetooth LE Bluetooth Classic Another Book You May Enjoy

Casting

The cast operator will convert the variable type to a different type. This will enable us to perform operations, like arithmetic operations, on variables of different types. For example, if we want to add two variables where one is of the float type and the other is of the integer type, then we will need to cast one of them, so the two variables are of the same type.

One thing to note is when we cast a float value to an integer value the value is truncated and not rounded. This means that if the float variable contains the value 2.9 and we cast it to an integer, the value will be 2. With this in mind, we generally want to cast integer values to float values rather than float values to integer values even if it means the operation will take longer.

The following code shows how we could cast an integer variable as a float variable to perform arithmetic calculations:

int...
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