5 (4)

5 (4)

#### Overview of this book

Welcome to the Robot World … and start building intelligent software now! Through his best-selling video courses, Hadelin de Ponteves has taught hundreds of thousands of people to write AI software. Now, for the first time, his hands-on, energetic approach is available as a book. Starting with the basics before easing you into more complicated formulas and notation, AI Crash Course gives you everything you need to build AI systems with reinforcement learning and deep learning. Five full working projects put the ideas into action, showing step-by-step how to build intelligent software using the best and easiest tools for AI programming, including Python, TensorFlow, Keras, and PyTorch. AI Crash Course teaches everyone to build an AI to work in their applications. Once you've read this book, you're only limited by your imagination.
Preface
Free Chapter
Welcome to the Robot World
Discover Your AI Toolkit
Python Fundamentals – Learn How to Code in Python
AI Foundation Techniques
Your First AI Model – Beware the Bandits!
AI for Sales and Advertising – Sell like the Wolf of AI Street
Welcome to Q-Learning
AI for Logistics – Robots in a Warehouse
Going Pro with Artificial Brains – Deep Q-Learning
AI for Autonomous Vehicles – Build a Self-Driving Car
AI for Business – Minimize Costs with Deep Q-Learning
Deep Convolutional Q-Learning
AI for Games – Become the Master at Snake
Recap and Conclusion
Other Books You May Enjoy
Index

# if statements and conditions

Now I would like to introduce you to a very useful tool in programming – `if` conditions!

They are widely used to check whether a statement is true or not. If the given statement is true, then some instructions for our code are followed.

I'll present this subject to you with some simple code that will tell us whether a number is positive, negative, or equal to 0. The code's very short, so I'll show you all of it at once:

``````a = 5
if a > 0:
print('a is greater than 0')
elif a == 0:
print('a is equal to 0')
else:
print('a is lower than 0')
``````

In the first line, we introduce a new variable called `a` and we give it a value of `5`. This is the variable whose value we are going to check.

In the next line we check if this variable is greater than `0`. We do this by using an `if` condition. If `a` is greater than `0`, then we follow the instructions written in the indented...