Python 3 tutorial 14: Python Variable by Manish Sharma

Key Takeaways

what's up Internet i am manish from rebellionrider.com welcome to my youtube channel today in this tutorial we will learn about variables in Python programming variables are an important aspect of any programming language because we are not only using them throughout this Python programming series but in our programming career also and if you are new to Python programming believe me this video is going to take your knowledge to another level so keep watching but before we start give this video a thumbs up also help me in reaching 1 lakh subscribers by subscribing to my channel if you haven't already now let's start so what are variables if you are following me on my social media then a few days back I posted this fill-in-the-blank on my facebook well congratulation to all of you who answered variable to this question a variable is a name that represents a value in computer's memory we use variables in our program to store access and manipulate data now let's see how to create a variable in Python to create a variable in python we use an assignment statement this assignment statement has two operands and one assignment operator the assignment operator is the equal to sign the operand which is on the left-hand side of the equal to sign is the name of the variable this is completely user-defined which means you can name your variable whatever you want but there are a few rules for naming a variable which you can read in the blog link is in the description anyways the operand which is on the right-hand side of the assignment operator is the value which you want to store in your variable that's all you have to do to create a variable in Python no data type no data width that is because python is a dynamically typed language you can read more about this again in the blog also there is no need to put a semicolon at the end of the statement although you can but there is no need see how easy it is let's do an example here I created a variable and named it a website and as a value I stood a string into it in the next line I displayed back the value stored into that variable using the print statement let's execute and see the result here we got the desired result which shows that we have created a variable successfully now let's move ahead and learn how to assign values to a variable in Python programming there are multiple ways to assign values to a variable in Python let's see the first one direct assignment the most commonly used assignment operation is direct assignment of value into the variable indirect assignment you create a variable and store of value into it this value could be anything an integer or floating number a string or an expression we have already seen the example of storing a string into the variable storing a number is as simple as storing a string into the variable such as you can see two examples on your screen in the first example I created variable with the name salary and stored an integer value into it which is 2800 in the second example we created a variable with the name by and stored of floating value which is 3.14 one into it apart from storing single values you can also store an expression into a variable that interpreter will evaluate the expression and show you the result as the value of your variable let's do the example let's see the result see how Python interpreter evaluates the mathematic expression and stores the value into the variable now let's move on to the second way of storing values chain assignment in Python you can declare multiple variables and initialize them by storing the same value into them let's see how but first let's have a clear worksheet greet in the first line we declared two variables var1 and var two and initialize them by storing an integer value into them which is 89 if you want you can store a string into them as well in the following two statements a statement 2 and statement three are the print statements to show you what values is stored into these variables let's execute and see the result here is the result and as you can see both the variables are initialized with the same value 89 let's see the third way of declaring the variable multiple assignment so we just learned how to declare and initialize multiple variables with a single value but what if we want to declare multiple variables with different values for example let's see I have three variables these are the three variables holding values of three datatypes variable one holding an integer value variable two holding a string and variable three holding a floating value question here is can we declare these three variables and assign their corresponding values into them using a single statement my dear friend Python is all about making things easier and a lot quicker yes you can declare these variables and initialize them with their corresponding values just by writing a single statement let me show you how you simply have to write the name of variables separated by commas on the left hand side of the assignment operator while on the right hand side write their values again separated by commas just make sure you get the order of the values correct because the first value will get stored into the first variable and second value into the second variable and so on now let's write the print statement to check if it works or not let's see the result seems like it worked I guess before you two starts getting boring for you we should end this class here so that's it for today make sure to subscribe as we will be discussing more interesting things in the next tutorial also please don't leave without hitting that thumbs up button thanks for watching this is Manish from rebellion writer calm