Python Tutorial for Beginners: Python Variables

Key Takeaways

hi and welcome we at 365 data science specialize in data science trainings we post videos weekly so you can master indispensable skills for free alright let's get started all right great in this lesson we will start coding what are the main concepts in programming is variables they are your best friends you will deal with them all the time you will use them to store information they will represent your data input let's say you want to have a variable X that is equal to the value of 5 and then ask the computer to tell you the value of that variable so we must tell the Machine that X equals 5 and this is how you could do this in Python type X equals 5 to go through the process of programming the line that says x equals 5 is called a command or a program this is just a line of text to make something out of it we must execute it only then will the computer carry out operations with it press Shift + Enter not just enter and a variable called X will be created and assigned with a value of 5 to be more precise equality in Python and in programming means a sign or bind to okay we carry this operation but we see nothing right now how can we ask the computer to show us the output of what we just did it would be sufficient to write x and then press Shift + Enter and here's the result 5 great as you can see typing in a single line of code and tells a few concepts of programming simultaneously now let's assign the value 8 to a variable we call Y all right shift + enter and we can check why however I'll type Capital y Oh an error this shows us that Python is case-sensitive so pay attention to that it matters if you use lowercase or uppercase letters an alternative way to execute the instruction that will provide the value we assigned to Y would be to use the print command at first sight it seems redundant as we showed we can just type Y nevertheless this command is applied often you'll see it in most of the code produced by professionals it complements the logical flow of your instructions for instance if we say print y the machine will simply execute this command and provide the value of y as a statement and this is all a programmer must see sometimes the last thing I'd like to share with you in this lecture is you can assign a certain number of values to the same number of variables to create the variables x and y we have to assign two values say one and two we must separate each of the variables in each of the values with a comma the parentheses here are not obligatory but we use them to improve the readability of our code now if I call X or Y separately the computer will correctly give me their respective values it is very important that the number of variables on that line equals the number of values otherwise you'll get an error message see great if you found this video interesting and want to gain an edge in your career make sure to LIKE comment and subscribe and don't forget to check out some of our other videos for another quick win in the data science skills department